That's not true at all. You think games would feel as immersive if everything was Calibri? Magazine-style articles would feel as tactile if they all used the same system fonts? Etc.
You may not care about fonts, but to say they don't matter is a misunderstanding. For example, I could glibly say we only need one programming language (the user doesn't care what syntax you used before it was compiled down to 1s and 0s!), but any engineer would make the case why that's not true at all.
I admire your passion, but... as someone who is not deeply interested in fonts, I view them in largely functional terms. Can I read it? Does it look ok?
Programming language choice has an aesthetic side, but it is also very much a functional concern. Can I write secure code? Will it be performant? Will it be maintainable?
Different languages represent different functional tradeoffs. Are fonts really the same kind of thing? IOW, how would you make a choice between using Arial vs. Helvetica?
>You think games would feel as immersive if everything was Calibri?
What computer are you buying that only has one font? There are dozens of fonts, covering all kinds of styles, on every desktop sold.
Yes: I think games would be approximately as immersive as they are now if everything was set in Calibri. Also: Calibri is a very, very good typeface.
>That's not true at all.
What specific iOS apps would suffer greatly by having to use the ~75 font families that come with the device? How would they suffer exactly?
https://wiki.mobileread.com/wiki/List_of_fonts_included_with...
Avatar was pretty immersive! And they just did Select-All and chose Papyrus!
Is your point weakened by the fact that there is not one freely available font to use commercially, but literally thousands?
If Avatar can use Papyrus, I think your apps are fine with common fonts.
How is using some of the thousands of freely available fonts out there even remotely the same as using Calibri for everything?
You're making absurd comparisons and not being sincere.