the wrong part is starting and then backing out when you've got other people depending on you.

What's wrong with it is that companies come and go. Sometimes they do well for a while and sometimes they do well for a lifetime, but they all eventually fizzle out. And, even if your company does well, the money is nice, but no matter how much money you make, it is not worth selling 1-2 years or more of happiness with your potential spouse and children. That enjoyment and happiness is the best thing in life, and is in fact a major part of its purpose, and no amount of money can compensate for its absence.

Family is number one and always must be. I have heard of extremely few situations in my life that justified the postponement of the formation of family. People think of it like an extra burden, and there is some extra burden, but it's absolutely nothing compared to the extra joy, the extra sharing, and all the other awesome extras that come with family life.

It's not worth putting family off for years to finish school, it's not worth it to become rich, there's basically nothing that is worth postponing the formation of a family for.