In fact, if youre like me, youve picked up some of these in boosters along the way and you play them in Commander decks whether thats a good idea or not because they give the game interesting texture
What makes Snatchcaster Mage so good is that, at the absolute floor, you get to dip into an opponents yard to play a consistency draw or ramp spell or maybe just exile something you dont want them to have access to
Still, some problematic enemy decks demand answers, and Dredge has them
While the effect of this card is decent (especially the fact that you can play it for free), its likely more the artwork/character popularity combo than playability driving this particular cards value
And since it's only been printed in Seedborn Muse and Drumbellower Maybe you dont want to use your resources each turn to get this result - crimes supposed to pay you after all, not the other way around
If not you are paying three mana for a 2/2 and feeling sad about it