You're certainly right about that. NFL, however, while allowing celebrations, still strictly enforces the taunting rule, as I think they should. (Not sure that rule applies to MLB, but if players start acting like a-holes, maybe it will) Apparently they know that if they allow or encourage it, every league from college all down to PeeWee will have players getting into opponents' faces, and no one (other than overly entitled parents perhaps) wants to see that.
65? Yeah, still young. Enjoy it, my friend!