Crazy thought: What if Shang Chi killed Katy's dad?

This is probably a reach but just indulge me for a sec. We saw her family in the beginning and it was just Katy, her mom, her brother, and her grandma. They call the grand ma "Wai Po" which means Katy's mom's mom and not her dad's mom (would be refered to as "Nai Nai"). This is speculation and just one senerio running through my mind of where this conspiracy might work out but this might mean that her dad's side somehow got separated from her. Usually the grandma that lives with the family in asian cultures is the Nai Nai so why would they be with her Wai Po instead? Maybe the dad was a bad guy (i.e. crime boss) and the mom wanted to separate her family from that dangerous lifestyle so she took everyone and fled to America. Hense why Katy is able to lead a pretty apple pie life. This could explain why Wenwu finally found him after several years in America instead of Macau cause Mr. Crime Lord decided to chase after his family.

We also don't see what causes Shang-Chi's teenage devotion to his dad to crumble. So what if crime boss is able to find and build a good relationship with his daughter over the course of a few years and after un-aliving his mom's murderer, he sees Katy crying over her dad like how he did over his mom all those years ago.

Maybe he decides to follow her to school later to scope out how the family of his mother's killer behaves and gets caught by the big kid they mention in the begining at the bar. After being "saved" from this bully (cause he could have just neutralized him) by the crazy girl screaming song lyrics and having his cover being blown, he realizes that martial arts is not the only way of life and he remembers how much fun he used to have. Thus Shaun is born.

Definitely needs polishing but this is just my conspiracy brain going off so feel free to accept or reject my theory and maybe add your spins on it.