WRONG! Sorry man, you just are.
Cliff was a flashy player when he wanted to be, his solos are pretty out there and are the main reason why people loved him. If you ever get a chance to see Cliff 'em All do so, some of the live performances are like a man possessed by bass, wah, and distortion. Awesome stuff.
Also, referring to the "stuff I'd play at 15," if you mean simple, that's another aspect of what made him so awesome! He could be one of the flashiest players around, 5 minutes later lay down a simple solid and effective groove like on Jump in the Fire.