This is a very shortsighted view from developer who forget a web page is not only a bunch of text. Designer also play an important role to provide the subtle design element that developers don't value.
By blocking all web fonts and fallback to only system font, you may still be able to read the text, but will completely missed the design.
By blocking all web fonts and fallback to only system font, you may still be able to read the text, but will completely missed the design.