What is weird/scary (especially when not documented clearly and in advance) is moving your entire bank balance into a personal account. Aside from government/tax/legal, you'd have your investors (in a venture/angel backed company) to justify it to. It's justifiable in this truly exceptional case of SVB imploding and no other bank account being available. (It gets harder to justify in a larger company with lots of investors and more money involved; moving a $100mm balance in a company where you were down to 10% ownership to a personal account even in this situation would be weird AF and depending on the banks involved might cause you problems. I probably still would have emailed counsel and investors/etc. on thursday morning to ask what to do; likely would have sent it to lawyers to handle actually in the huge-account situation.)
Now you've got a weird thing to explain and no vindication.
Generally the law handles this through the "reasonable man" standard; i.e. "would a reasonable man, knowing what you did at the time, have done what you did?" This would allow you to shoot someone in self-defense who was holding a realistic looking toy gun at a child (which you believed to be a real gun, unlawful intent, etc. at the time).
If documented its no problem and not uncommon at all in Germany.
In fact many business owners pay something like credit card bills personally and reimburse through the company later.