@b0rk There's a bunch of reasons for me. I think a big one is I want details, I want things to be explained to me, I want to "build the command" myself : (good) man pages seem to do it more often than online searches ?
Searching online has become more and more infuriating as well, which doesn't help.
Part of it is also "because I'm already here" : if I am already in a terminal, might as well just `man thingy` rather than go to my browser.
It also feels much more information dense if I need to have something in split-screen ? Man pages are often quite compact, and splitting my terminal feels like it adds much less space than having the browser's UI+website spacing+ads (I only recently started using an adblocker, I know...)
But it's a lot of "feels" rather than very thought out, though I definitely do it even for learning a new tool as well. (SSH options and socat are recent examples)