Lutris, PlayOnLinux, Proton, etc. are all really cool. But, if you value your time and security, just keep a dedicated Windows system for gaming. I keep all the things I actually care about or don't want stolen on my Linux system with full drive encryption and I keep a gaming PC that has absolutely nothing I care about on it. The Windows system is never allowed to access my email, credit cards, or anything I care about in any way.

The small price I pay for having to manually type a Steam authentication code from my phone into the gaming PC is worth it to never have to worry about the insane level of insecurity and bugs from the gaming sphere. The amount of RCE in gaming is pretty bad. And, you know, sometimes your friends message you and want to play a game that is new and from a developer nobody can really trust.

Combine that with the fact that the first thing almost every game does is phone home to try and download new executable content and IMO you would be irresponsible to keep your important documents/credentials on a system that is also used for gaming.

This makes no sense. So you value your security but then choose to go with a less secure operating system?

You can easily install all your games on another user on your linux box and run as that user. Super easy and it won't have access to any of your main home directory files. In fact with this configuration it's a lot easier to ensure that the games are sandboxed away from anything important.

In contrast on Windows most games run as Admin or at some point ask for admin privileges.

Running games on Linux is not about security or time savings. It's about control. It's about being able to sit down and play your game without Windows having a hissy fit about Windows updates. It's about being able to just play without worrying that some bad patch from Microsoft will hose your entire setup. And it's about finally wrestling control over gaming away from a company that cares more about taking your money than actually letting you play games you already have.

And the more people we get running Linux for gaming the better everyone will be better off for it.

I game on linux, it's not as secure as I would like it to be. I run everything under unprivileged container including steam, the problem is that for vulkan hardware renderer to work it requires direct access to the device and the linux kernel doesn't virtualize device access. It's a security nightmare as far as I can see.