Selling volatility takes me 30-60 mins each week and requires me to monitor the markets in case things start going crazy (big moves up or down in a single day can have outsized impact and require immediate adjustments).
The bigger effort was learning all the ins and outs of selling volatility with derivatives. I probably read 7 books and studied for 2000 hours before I developed the approach that I thought was going to give a good return for the risk involved. It wasn't a chore, it was something that just became fascinating at one point, and there was a couple years where most of my free time was spent reading and analyzing it to become an expert.
I don't see any scenario where I stop selling volatility after I retire, unless I just want to stop having to think about the market, in which case will just put it all into things that generate interest and dividends with a very low probability of losing value.
I would say that investing is now a hobby - but understanding it thoroughly was a consequence of the early anxiety of not having a lot of money. Investing felt like a necessary skill to eventually make it to financial independence alongside having jobs of increasing responsibility that pay more.