You are operating under multiple layers of ignorance and frankly, I just don't have the energy to correct everything you've said but suffice it to say:
1: Properly designed visors will actually protect you and most definitely will not "break your neck".
2: There are literally hundreds, if not thousands, of bicycle helmets with chin guards. I would strongly encourage anyone doing jumps, downhill, or even e-bikes at higher speeds to get a good MIPS full face helmet and wear it every time. If you're going to go faster than 25 frequently it's probably even time to get a DOT/SNELL certified moto helmet.
You don't know what would have actually happened if you were wearing a properly designed helmet because you chose not to wear one, which was an objectively foolish decision no matter how you try to justify it.
I have no interest in debating this further though, believe whatever you like: It's your brain to protect (or not).
Nope, I'm done debating you on this insanity. Good luck, sounds like you need a lot of it.