Hell, before that, we knew Flash was being used to get the list of fonts you have installed (for tracking purposes). You're right that these quotes are just plain wrong.
This has suddenly made me wonder how often fingerprinting of installed fonts is used to find targets working for particular companies. Quite a lot of organisations now have their own font, or a particular uncommon font they favour for brand purposes at least.
Well, nobody has Flash installed anymore (I hope) and I don't believe there is a "modern" way to obtaining a font list (that works on all/majority of browsers). So, at face value, looking at installed fonts doesn't sound like a meaningful attack vector these days.
I believe you can do some stuff with CSS by providing a list of fonts to try and then comparing the size of a block of text, but yes, it is quite a bit harder now.
https://petsymposium.org/popets/2021/popets-2021-0004.pdf
Hell, before that, we knew Flash was being used to get the list of fonts you have installed (for tracking purposes). You're right that these quotes are just plain wrong.