Ryujin
Legend
BS
The former is a choice. Expertise, especially for a melee character, is weaker than tactics. Combat advantage, leader bonuses, status effects, monster knowledge, etc. all add up.
For the latter, some times you simply don't qualify for feats until Paragon even from a mechanical standpoint. Take Superior Will, as an example. If all I can squeeze out in heroic is a 14 Wisdom or Con, I can't take it there. But as a defender or leader, it's mechanically worth it to use a paragon feat on it.
There are more examples too. Your statement is made in a vacuum.
No, no BS. Your statement presumes that Expertise doesn't function in the presence of things like leader bonus, combat advantage, etc..