There really isn't an issue with it, you can ignore that critisicm really. Even if an infinite chain is possible, I personally can't see it and at minimum, we're talking about a combo that requires 5 or 6 different specific cards (this, Procession, King's Court, Black Market, Counterfeit, probably Throne Room, plus a drawing card). I mean with that many cards specified we can empty the supply in about 8-9 turns!
This card can lead to interesting tricks not currently possible in the game. That's a good thing, not a bad thing. Imagine if people took this attitude to real cards, Donald couldn't publish anything new. 'Woah Procession lets you trash a card from play and gain something, this could lead to infinite turns, we should just ban it permanently now!'