If only it were that. You have to put up 25000€ in capital and pay absurd amount of fees to the notary for essentially being a text to speech translator.
The minimum capital requirement is the whole point of a GmbH. If you don't want it, you can found a UG, which is the same thing with no capital requirement.
Trustworthiness. You know a GmbH has at least 25000€ you can sue them for. And a UG has to put parts of their profits into becoming a GmbH, so eventually everyone big enough is a GmbH.