Why is Sen no sen/Interrupting punches and combinations so uncommon in most kickboxing styles?

I’m going to praise myself, and in doing so also praise my teachers. To paraphrase former Trump administration flunky Anthony Scaramucci(Or however you spell his last name) he said “Steve Bannon sucks his own dick.” Well I don’t mean to suck my own dick, but most people I teach or spar with me say I