No it is not strange as people on student / training permits are considered to be on a temporary stay for the purpose of studies and are expected to leave at the end of the training period.

It is only after a relatively recent revision of the law (following the Neyrinck parlamentary initiative in case curious) that access to non-EU graduates of Swiss universities was eased, of which the second sentence of art 34 al 5 stems from.

I let you read the SEM guidelines and ordinance for the admision, stay and lucrative activity for foreigners (OASA in French) to understand what counts as a raison majeure (I can save you time and tell you being a postdoc is not one of them) but best of luck to you.