This seems a fair request; though, that’s only my opinion.
However, there is nothing preventing you from installing some of your own preferred fonts. The vazirmatn font family itself is available via the AUR (vazirmatn-fonts 33.003-1), for example:
pamac build vazirmatn-fonts
Either of these links provide useful information on installing fonts:
Some online font resources:
- Persian Fonts (MyFonts)
- Persian Fonts (FontSpace)
- Persian Fonts (Fontjo)
- Persian Fonts (1001Fonts)
I hope this helps. Cheers.