I'd also add that "you'll have no time" thing doesn't really feel like that. Unlike a job or some other big but necessary commitment, the feedback loop on where that time is going is pretty quick: it's going to your child.

You feed a baby they're happy, you change a baby, they're happy, you get them to sleep and they'll be happier. It's a very different experience IMO to anything else: it takes as long as it takes, and it's all necessary, but the feedback loop is close to instant.

Source: am the father of an almost 7 month old so far (and was extremely skeptical I'd enjoy it as much as I actually am).