It's not ethical. If you pay for something to rent, it is not yours to own. The solution is to vote with your dollar and go somewhere else. You don't have to play the game.
It is not possible to own many things anymore due to the advance of technofeudalism. Before the norm was CDs for music, which you could freely gift to family or friends, could listen to forever with no ability for a 3rd-party to revoke your ability to enjoy it, and when you're done you could even resell it to others with no restrictions.
Nowadays however you either pay for a license for it from Apple Music/Amazon/Bandcamp, rent it from Spotify/YouTube Music, or in very rare cases it's available in vinyl. You're not able to gift your purchased music to others, except by purchasing them a license too. You're not able to resell your purchased music, as it violates terms of service. You're not even able to listen to it forevermore, as many of these platforms remove artists and songs as well as revoke access to personal accounts in many documented situations.
If there was indeed still an alternative option to actually pay to own it then I would take it. But there quite literally isn't with most media today.
Look at videogames as another example. Denuvo and other DRM significantly worsens the user experience by reducing FPS, limiting how many personal devices you can experience this content on and requiring an always-online connection so they can constantly harvest data about your usage patterns. They can even prevent you from modding the game or be at risk of having your account banned.
What is someone who has been a lifetime hobbyist of any of these forms of media to do? Just accept that you no longer are able to freely experience the content you enjoy in the way you want to? No, I believe it's ethical that if they're going to try and trick customers who think they're actually "buying" an album, videogame, book, etc then that individual is free is strip the DRM, download a pirated version, modify, resell, gift and do whatever they want with their purchase if they want to. Fuck this "you'll own nothing and you'll be happy" future.
You cannot support the creators if you are stealing their work. What do you mean by "whenever you can"? When can't you?
Imagine you're really into rock music. You listen to playlists for an hour a day on Spotify, which shuffles through all the various trending songs. Then you decide you want to start owning the media you enjoy, so that you can permanently enjoy it without anyone being able to take that away from you. How do you then start supporting all the various artists and songs you've enjoyed?
Do you try to go back through your listening history and buy a license for each individual song from Apple Music/Amazon/Bandcamp and then strip the DRM? A ton of work, and this continues whenever you want to obtain something new. Do you get a Spotify/YouTube Music subscription to relieve your conscience then pirate the songs? Artists receive only fractions of a penny for thousands of listens on their songs so you still might not be helping them as much as you think. Do you accept that the media you consume will forever be ephemeral and you might easily lose access some day to your favourite songs? Not what I'd opt for, but each to their own. Few artists have ways to directly donate to relieve your conscience that way because all the middlemen want their piece of the action.
An
EU-funded study (which they tried to prevent the publication of) proved that piracy doesn't negatively impact sales. Back in the days before Spotify and when everyone was pirating music from Limewire, BearShare and the like there were just as many artists and bands becoming insanely popular and rich. This is because if you pirate then you're still becoming their fan who'll spread their music through word of mouth, and you're more likely to spend on their concerts, merchandise and future albums.
Our evolving technofeudalistic society focuses on access not ownership, and unfortunately the Bible isn't as easily applied to niche issues arising from technology like this so you're best off getting moral advice from a tech-savvy priest. I'd opt to financially support indie creators wherever you can whilst not feeling guilty for pirating a classic version of Disney's Snow White or any other legacy content from entertainment conglomerates. Everything between those two extremes is in the grey middle area, just do what's in your means to especially support the little guys which includes financial support, word of mouth, user-generated content, reviews, etc.