Given the right circumstance, people will do that. But it is not the normal behavior, you would need extraordinary circumstances.
I might do it if I found a woman that was
1) was ready to pick up and move her life.
2) compatible sexually
3) compatible intellectually
4) compatible hobbies (i.e. a dancer in my case)
5) clearly communicated her high interest in me in a reliable and honest manner.
Note the last time I tried long distance dating, as soon as I indicated I was actually going to come to her city, she stopped communicating with me. I still resent her dishonesty. All she had to do was say "hey, slow down a bit". But she was so concerned with keeping me on the 'hook', that she refused to tell me she wasn't ready to meet physically.