By "technical skills", do you mean programming? Because plenty of financial based technical skills are taught in MBA programs.

Of course, HN loves to blame MBAs for everything that goes wrong in tech companies; meanwhile, how many founders can't read financial statements, have no idea how to market, can't budget, can't do HR and get suckered in by VCs? Plenty. I think there's a direct correlation between people who think MBAs are "useless" and those who don't understand that running a business is much more involved and harder than it seems.

MBAs aren't required in tech in much the same way Computer Science degrees aren't required. But they're certainly valuable.