These items have always been part of D&D, and appeared in both of the previous Baldur's Gate games. Did the Gauntlets of Ogre Power you could get from the Low Lantern invalidate Minsc's 18/93 Strength? No, because you give the Gauntlets to someone else (Jalhera isn't a bad choice) and give Minsc the Gloves of Dexterity instead.
This misses that most classes don't really NEED high stats in their secondary attributes. A wizard with 20 strength is just as strong as a wizard with 8 strength. Neither will ever really make use of it. I guess you can jump better and avoid being shoved...
But mostly, nothing changes. Same for a wizard with charisma.
What matters are the primary stats, and constitution. If you can set your primary stat to 20 anyways (and remember, you do not have to cripple yourself until then, you can respec!), that really opens the door to min maxxing
