I game on a dedicated gaming PC because I have to run so much background crap on my main workstation to support my workflow, that it was interfering with my games. Also, I prefer not to update my gaming system too often to avoid issues with games, while I prefer to keep the workstation fairly up to date on sevurity patches (although I usually stay a month or two behind to keep from being screwed by a bad patch). I need Virtualization on the workstation because I use VMs.
I am logged in as a limited user on the workstation for security, but on the gaming PC I'm admin (both local users) because otherwise it's a pain to deal with some utilities I use on the gaming PC, like mouse XMouse which will nag for admin permission on startup.
On the gaming system, since that's all I use it for, I keep it as clean as possible. Defender is running, but I have core isolation, memory integrity, and virtualization turned off. I use Firefox with uBlock Origin just for browsing game tips, and downloading driver updates.
I personally don't worry too much about 90% of the security flaws announced every month because most of them require local access, or (like Spectre and Meltdown) don't really matter on anything but a server (and yes, I have the Spectre and Meltdown mitigations disabled on the gaming PC).
So, I'd be comfortable with your level of risk. Heck for a long time I never even ran any AV until Defender was baked into Windows.
Nowadays I honestly believe that your primary line of defense is your browser. Keep it up to date, use a reputable adblocker, use NoScript, or better yet, a VM, if you visit any REALLY dangerous sites, although it's a pain to manage permissions in NoScript. I do use it in Firefox in my safe browsing sandbox VM.
Yes I do visit some dangerous sites for research, and things like torrent aggregators, when I'm looking to download a TV Series or movie I can't seem to find on streaming or DVD, but I do that in a VM on the workstation for security.
"I want AI to do my laundry and dishes so that I can do art and writing, not for AI to do my art and writing so that I can do my laundry and dishes."
- Joanna Maciejewska