That's why I said the tall alimony is some kind of apology.

With respect, that's sophistry. It's compensation from dad for the reality that mum sacrificed her own opportunities in support of his. Or vice versa.

And the chances are that he'll earn more, among other things, because in tech jobs, any absence tends to make one obsolete. Going out of work for a few months or years can effectively shut down your career and weld it to a lower level.

Precisely. So if mum and dad agreed that mum should sacrifice her opportunities, of course dad should expect to support mum if they split, especially if she takes the kids. It's not an "apology" (why would it be an apology if mum and dad both agreed it would be best), it's just supposed to be fair. If there is acrimony it isn't because society is sexist, it is because two unhappy people are taking one last swing at each other. It IS supposed to be fair.

May I also use the "plural of anecdote is not data"?

LOL

It would be interesting to see the worldwide statistics on their earnings, percentage of managerial positions etc.

Those stats always show men earning more. It might be more useful to pick specific professions- say nursing, police work, medicine, secretarial, programming, and compare incomes for people of the same qualification and experience. If that doesn't show a major difference, then you could look at reasons why one gender or another clusters in a particular high- or low-paying job, or why one gender or another has different levels of qualification and experience.