With all the debate swirling around, why can't they just make it so that anybody can go in any bathroom they want?

Edit: I didn’t include the following caveat (in bold) in my original question: I am referring to multi-stalled public bathrooms, NOT single rooms.

Also, this isn’t about transgendered people. It’s about any people using any bathroom they want to.

I don’t want to hear what other people might say. I want to hear what you say. I want to hear your opinion, not the fact that others might go into melt down.