Earlier quoted context omitted.
As explained in the article, if you don't have 25k€ of capital, then you open an Einzelunternehmen (sole proprietorship), not a GmbH (LLC). It's a much simpler process.
You can also create an UG (haftungsbeschränkt) which is basically a GmbH with the 25k€ requirement removed. The only drawback is that this can make the operation look less trustworthy, depending on whom you are dealing with. If you are selling Hot Dogs, nobody will bat an eye if it’s a UG, but if you apply for a big software contract, people might be wary.
It seems to me that a sole proprietorship would do more to protect against counterparty risk, i.e. more of the person's assets would be available to satisfy the debt.
My guess is that counterparties prefer a limited liability partner to arguably insulate themselves from employment liabilities.