Support the creators who deserve support. Otherwise you will end up with nothing good to pirate, because all the creators who deserved support and made your favourite creations, starved to death (or got other jobs, effectively the same thing)

Your single act of piracy is not likely to make a difference either way, but on the other hand, your single act might indeed be the straw that breaks one particular camel's back. And collectively we have to take some responsibility for that. It's not even just about ethics (although it is ALSO about ethics), it's about self-interest. You can be an individual freerider if you want, but eventually the freeriders overwhelm the system and it shuts down.

Realistically there will always be plenty, plenty of games to pirate. But the key question is, will enough of those be good games, the really enjoyable ones that you want to play? The AAA slop and rehashes will never stop, oh they''ll churn and froth and lay people off and blame pirates but they're effectively self-sustaining, it takes money to make money and it takes money to lose money and there's enough money in the system to keep them churning out sequels and derivative "new IP" until the heath death of the universe. There will always be some good games to pirate and to play no matter what you do, no matter what we all do.

But it's not a binary condition whether our financial support or piracy matters. You vote with your dollars. Your dollars guide the AAA studios in their desperate chase to steal the dollars from us, and your dollars literally enable indie developers to continue their projects at all. If too many people are not rewarding the kinds of novel and well-made games they want to see from AAA studios, and not supporting people's passion projects that they've poured years of their lives into, you're not going to see as many novel and well-made games or passion projects like that happening, and odds are good that at least one of the ones you won't see happening will be one you really would have enjoyed.