Question: Why have I only been in this perspective since I was born?

This answer is from a Buddhist and Kantian perspective. 

The “me” isn’t really a me but personality generating machine that believes in a me. I do mean machine because our body is what makes the perspective and not something else. 

If we were independent of the machinery that houses us then we would be ghosts in shells. The fact that few have claimed to see shell-less ghosts means likely we need the body to be who we are.