No, that's bullshit. The media is telling two dozen reasons and then the only actual reason mentioned is put in a row as just another excuse unthough all the others were invented by journalists.
Germany is indeed not allowed to because that's in the constitution. Maybe you read it for once to see why they actually can't send soldiers to other countries without a complete vote in parliament. Yes... that constitution is influenced by history. But simplifying that issue so much it's none-sensical just to tell another lie of how they are either afraid or ashamed to do anything against Russa is still a blatant lie.
But hey. We all know you will not allow yourself to ever acknowledge facts. Because hating your government because of lies you tell yourself makes everything so much easier, as we see in moronic elections right now again.
These "cowards" are actually one of Ukraines biggest supporters. While the only thing you support is the fight against democracy by parroting lies and bullshit.