If you're just asking if there is a reason or not, then no, there is no obvious reason.
One less obvious reason is because Intimidate was quite a common ability in generation 3. I know Swarm was quite common too, but not much has ever had Technician. And Scizor uses it really well with Bullet punch and Bug bite.
So just ask yourself, would you rather Scizor had Intimidate or Technician? I know which one I would choose.