Yeah this person is a serial troll. They will troll and argue about anything even if they are blatantly wrong and everyone knows they are wrong. They seem to have honestly nothing better to do, since almost all of their replies are trolling and hostility.
Captcha these days isn’t even really a CAPTCHA in the traditional sense since most of the work it does is based on filtering of IP and browser fingerprinting, with a certain level of gamification because the goal is not just to keep out the people they fight against, but to waste their time, would work great if it didn’t waste normal people’s time, while real bad actors have easy ways to get around it.