I think Thiccy explained it very clearly in Threadguy's livestream why no one can truly leave:
After reaching his goal, he took a six-month break, trying other games, hanging out with friends, exercising, etc., and found that the pace of the real world (non-online world) was too slow. It felt like they were living ten years in the future. In the online world, the feedback is incredibly fast, which is why the elite of humanity gathers here to play games. Furthermore, the substantial rewards, coupled with instant feedback from some of the smartest people on the internet, make it really hard to leave.
I originally planned to quit after the 2024 cycle ended. But I changed my mind. I'm already spending over 12 hours a day here, and I can't imagine suddenly stopping completely. This is what I'm good at (of course, far inferior to many veteran players), but as long as I enjoy it, why not continue?
I also told myself before that I would quit once I earned $1 million. As it turned out, I actually achieved that goal in 2021. Now, pursuing huge profits is no longer the most important thing for me (of course, I don't mind), but rather the game itself is extremely challenging and highly competitive. I will never be as good as those traders or DeFi enthusiasts on CT, but as long as I enjoy it, can continuously improve, and can gain something from it, I am satisfied.