White in MTG has been flavored in the form of angels, spirits, armies, knights, and clerics
Slap some obnoxious hatebears like Aven Mindcensor, Collector Ouphe, or Thalia, Guardian of Thraben in there alongside a Winter Orb and youve created something truly offensive
It gets you started early by virtue of being a 0-power creature, and itll put a +1/+1 counter on a creature you control regardless of if you have three differently-powered creatures
Theres a case that white is not a powerful colour for interacting on the stack, but a history of protective and defensive spells that make things Protected from things is a form of stack interaction
If theres too much countermagic, too little ramp, too many big threats and not enough ways to survive long enough to play them maybe your commander needs a critical mass of a card effect you thought you had, but didnt