Is this a safe technique?

So I have been trying to figure out a way to access a model without knowing exactly which model I was trying to access by assigning a value inside my player model to the model object when I sat down on a seat within the model. It was a huge mess.

My solution was to instead of assigning the model to a value within my player character, I literally moved the entire model into the model of my player character, so then local scripts could interact with it.

That is what I am asking if it is safe or not because to explain what is going on:

You are sitting on a seat that is in a model and that model that is within yourself.

Edit2: So my plane isn't functional, but that's not due to this illegal roblox building technique