Because it's Irreversible.
Heard it on Succession HBO, "That money is too high to keep you doing a job but too low to do anything else you want. You are the poorest rich person"
Secondly, I might have to take a hit on my income if I move out. And if I want to earn more later, companies won't hire me easily for a hike post 35. Competition for this cohort has gone insane. Lose momentum & you risk becoming Rayadu (talented than KL Rahul but can't get a break). High income careers are becoming short very fast. If one earns 30L+ before 30, he probably won't last till he is 45 unless he is extremely talented and moves up the ladder.
Thirdly, with high corpus already and high income too, life in Bangalore is not that an issue. You can live lavishly and save lavishly. Better to procrastinate on a life change if it ain't broken. If one isn't happy, move within BLR to a better location, spend more to fix that (like hobbies, vacations etc).