I agree in general, but I have been in several games where the starting conditions were along the lines of "We're starting at level 5, you have 1000 gp, any mundane items you need, and one uncommon magic item of your choice." In that environment, picking up something like Gauntlets of Ogre Strength is a sneaky good choice for classes with multiple ability score needs like a Paladin, or adding on a nice melee attack to a Cleric or Bladelock.
And much like AL - that's not normal D&D.

Anytime you can pick exactly the items you want for your character, the certain items can have their effectiveness increased by making a character that can make the best use of whatever that item does. It's basic min/maxing or powergaming.
Anytime you play in a game where the players get to pick the magic items for their PC's, at least a few of the players are going to end up with more powerful characters because they make sure they can use the items as effectively as possible. (And often you will have one player will have no clue what they are doing an pick an item because it sounds neat but does nothing for their character...)
It's just human nature.