There are two issues:

  The use of bad fonts
  The loading of fonts via third parties

iOS did have a very bad font in the past but the font was embedded. With an OS you don't have to worry about a third party that might track you or serve you some infected font.

Add blockers block those third party fonts.

Personally I block all fonts via a Firefox setting because my dinner is served much faster and still tastes good (or better)