I use either comic sans, or similar fonts when writing the document and forget to change it all the coments are "reformat from comic sans". Using comic sans as its easier for my dyslexic brain to read.
Have you ever come across the Open Dyslexic font? Won't save you from your coworkers telling you to update the font (I'd imagine), but might be nicer than comic sans to read!
A simple but honestly kinda brute force way around it is to replace the TTF or equivalent font file for their font with a copy of Comic Sans on your system. It will show as Comic Sans on your system but will actually be Arial or Times New Roman or whatever in the document, so it will be what they expect on the other end.
That said, it is a simple accomidation, it should be manageable for them.
Oh of course, I just find that having some weird needs gas made me seek weird solutions and I like to share them around. I definitely didn't get anything malicious from your post? Not sure if my tone came across poorly, I was going for a cheerful and helpful response, not any sort of critical or nasty, sorry if I sounded harsh or anything like that, definitely not my intention.
IKR?! I personally don't bother arguing with game designers unless they seem sincerely interested in feedback, because a game with unreadable text isn't fun for me, and I try not to waste my time playing or discussing games that aren't fun. If the designer wants to limit their userbase to people who are willing to read cutesy fonts, that's their problem, not mine. And I suspect it can be a problem when they already have a small userbase, and they make a design decision that alienates some of the very small number of people who have heard of their game.
But in education, or with user manuals, or any number of other products that are hard to replace... yeah, graphic designers should not get the final say when their opinion is that aesthetics are more important than accessibility. If I can't read the user manual, website, or whatever, I am going to call customer service, but not everyone has the time or comfort level with phones for that workaround.