Yes, servers can disable downvotes. Beehaw does that, for instance. I’m on lemmy.world which allows both. I prefer both because I think it helps silence bad faith participation with less active moderation, but I respect that some places don’t want it.
His persecution fetish is showing
This is great advice, coming from someone who pondered using the “Mother was really sick and had to manage her illness and passing” excuse if I ever went back, as it was true for me too. (I’m sorry for your loss, it’s a really painful life transition, I know.)
I ended up taking a slightly different approach. I worked in IT project management before I retired early. My LinkedIn resume shows me currently employed as an “IT consultant” and will until I decide I need another job or I kick it.