So uncomfortably true!
I recall spending a (large) number of weeks struggling through Elementary Stochastic Calculus, which had an incredibly misleading sticker on the cover proclaiming:-
"This book is suitable for the reader without a deep mathematical background."
(Tweaked) Verdana FTW.
I liked proportional fonts for reading code - several of my favorite programming books used proportional fonts for code examples - so when Verdana was released in 1996 I switched to using it in my IDEs. I've had 27 years of pleasantly ergonomic coding - it has a high x-height, different 0/O, I/l/1, and impeccable hinting and kerning. ❤️❤️❤️