Firstly, vasectomy's ARE reversible. The procedure and after affects are extremely minimal compared to the woman having her tubes tied. The womans hormonal balance can be out of whack indefinitely and the procedure itself is more invasive than a vasectomy.
The crux of the problem here is, men just don't like the idea of anyone going after their good bits with anything sharp or pointy.
Hubby had it done several years back, and when he went in to the office, he came back about 5 minutes later. I thought he left his CareCard in the car and was just coming back to get it. He was DONE. We went to a staff party afterwards and even danced a couple tunes. He had a little bruising the next day, and that was it.