I work in a related space. There is no good solution. Companies are quickly developing DRM that takes full control of your device to verify you're legit (think anticheat, but it's not called that). Android and iPhones already have it, Windows is coming with TPM and MacOS is coming soon too.
Edit: Fun fact, we actually know who is (beating the captchas). The problem is if we blocked them, they would figure out how we're detecting them and work around that. Then we'd just be blind to the size of the issue.
Edit2: Puzzle captchas around images are still a good way to beat 99% of commercial AIs due to how image recognition works (the text is extracted separately with a much more sophisticated model). But if I had to guess, image puzzles will be better solved by AI in a few years (if not sooner)