Lawyers have some pretty decent progression and it's very common to open your own firm later in life. It makes sense for those with aspirations to work that hard for that payoff.

Tech, not as much. There are certainly unicorns that probably became billionaires after burning years of midnight oil, but many tech ventures fail, regardless of the experience involved. There is always a need for a lawyer, meanwhile.

I wouldn't do all that overtime on a gamble, and I argue you don't even need to do overtime to win such a gamble in tech.