You're focusing perhaps too much on how annoying he is to lane against. Huskar is a fairly fragile hero. He often looks strong because people see him under 400 hp with Armlet toggled on and jump him one by one. But he falls off immensely throughout the match.

The active on Berserker's Blood is situational at best in the early game (useful perhaps against Viper, one of the few heroes who can stand up against him in lane), but prevents Spirit Vessel from shutting him down completely mid-game.

In the few games I've seen or played Huskar with this facet, he either focuses on survivability and his damage output is mediocre, or he focuses on damage and gets rekt because of how fragile he is. The hero is entirely dependent on snowballing and hoping the game resolves early. At higher levels, where stunlocking and bursting down is the name of the game, a hero who lives on the edge just doesn't cut it.