I can see it, coming from being around boomer executive types. It’s a testosterone piss mark like the crushing handshake.
And not to be a downer, but I was taught that way too. Not the aggressive ink and strokes from Trump (lol, mic drop), but the obfuscation. Back when cheques were big anyway.
I was actually taught first, getting my first account as a kid, that you could sign as Superman or X as long as you just kept doing it. Kinda shaped me.