On the left is his handstand before we met. And on the right is the one after being in a relationship with me for a few months. Now I don't want take the full credit for this change, but let's just say that I gave him a few pointers, ehm.
David is actually an amazing example of a person that can handstand, but whose form kinda sucked (sorry, buba). In the left picture, you can notice the hands wide apart from each other, the slightly arched back (banana shape is super common) and very uncoordinated legs. He could handstand, but staying in place was a real struggle, he basically always had to walk on his hands.
Handstand is definitely possible even with a bad technique, but most likely you won't progress past a certain point. Plus maintaining this form is actually much harder to do for your body (you have to “power” through).
David could do that, because he was trying handstands since forever and has developed muscles to support that shape. But it's not gonna be possible for everyone to just “wing it” like that. And the good thing is, you don't need to.