True. Presidents are considered responsible for everything, even where they have little personal impact (gas prices, the economy, global conflict, etc.). With Trump, given all his business interests/lawyers/accountants/etc. from his business life, it's amplified. This is a perfect example.
Firstly, it's unlikely he did actually break the law here, but secondly, if he did, what are the odds he knows/understands why or how he broke the law. Whatever doc he signed was likely in a pile of 50 that his lawyer/accountant told him he needed to sign.
I don't have NEAR the number of irons in the fire these public figures do, and if I were accused of tax fraud, I'd call my CPA and say "hey what's the deal with this, can we get it resolved?" I wouldn't have a clue, I don't touch any of it.
I don't imagine the truly rich have much idea either