It isn't bullshit. Imagine the US had made a free and open vote before invading Iraq. Or Russias held a free and open vote before invading Ukraine (one can dream right?). We might have avoided both those invasions.

If the Swiss choose to constitutionalize this, it is beneficial for everyone. The non neutral countries know that they cannot do business with Switzerland regarding any weapons or military equipment. They know that Switzerland might still give warring enemies access to funds, so Switzerland can be blocked from international currencies and the borders can be controlled extensively by the EU, if the need arises.

If we manage to get past the rich tax evaders lobbies we can finally start to treat Switzerland properly and make it more difficult for criminals to hide their money in Switzerland.