I think that macOS and Linux support is really important for devs and users. There’s also things like GitHub actions which allow for easy compilation of those platforms.
Viewing post in A critique on the rules from a standpoint of inclusivity :)
The compilation isn't the (main) problem, the problem is quality control / testing these builds. It's already a BIG BONUS for a game to have these builds; so why make it grounds for DISQUALIFICATION to omit them? Just locks out people who might have a very nice game but no energy, time, or money to afford a Mac or Windows machine. :)