I can't really speak to the first part of your message, since I've never really tested anything like that, but at least anecdotally I've never really noticed any additional click latency in Linux compared to Windows.
For the second -- FFXIV works flawlessly _once you get it set up_, but there's a couple tweaks to deal with to get there -- the launcher in particular (the default/"modern" launcher doesn't play nice). Games with separate launchers in general seem to have more issues/be more finicky in Proton. I don't personally use ACT, so I don't know if there's any real issues with setting it up, but I know others on Linux who do so it's at least possible. For your reshade concerns, GShade[1] comes with a linux install script that I've had no issues with.
Believe it or not, League of Legends actually works pretty well on Linux (I run it through Lutris). It takes a while for the launcher to initially load on startup, and the launcher is a bit of a slow/laggy mess, but from what I hear from my Windows friends the latter at least is just a general LoL launcher problem more than a Linux problem. Once you actually load into a game it runs completely flawlessly, with great performance.
With all the work that's gone into Proton over the past few years, the vast majority of games Just Work and there's very well-documented tweaks for making the vast majority of the rest work as well. It's relatively rare to have a game that's completely unplayable on Linux, unless it's hampered specifically by anti-cheat software that doesn't like Linux.
> I'm not sure how one could avoid dressing to express oneself, to at least some degree, unless you exclusively wear work uniforms or hand-me-downs.
Exclusively wearing work uniforms (outside of work) or hand-me-downs is still, in its own way, expressing oneself. One way or another you make a personal decision on how to dress and whether to follow a particular style, trend, price point, etc. and that reflects something about you.
For the second -- FFXIV works flawlessly _once you get it set up_, but there's a couple tweaks to deal with to get there -- the launcher in particular (the default/"modern" launcher doesn't play nice). Games with separate launchers in general seem to have more issues/be more finicky in Proton. I don't personally use ACT, so I don't know if there's any real issues with setting it up, but I know others on Linux who do so it's at least possible. For your reshade concerns, GShade[1] comes with a linux install script that I've had no issues with.
[1]: https://gposers.com/