you can’t anymore actually. There was a ruling of the Europäischer Menschenrechtsgerichtshof (I think that’s how it’s called?) (not the one of the EU but the one of the European Council) that that was discriminatory and they legally have to allow everyone to serve.

It was in an official document on the official website (I think of the Kanton Luzern?), so it certainly isn’t a fake. I can possibly find it for you again if you want to.

Edit: can’t find the official Document, but here you go: https://www.srf.ch/news/schweiz/europaeischer-gerichtshof-wehrpflichtersatz-diskriminiert-gesundheitlich-untaugliche

In the second paragraph they talk about what I just said.