It's just that it takes me many hours to achieve some of the goals. (Still less than halfway on standard goals in Black Hole.) If I have a wonderful game and unlock most of the wizard goals after completing the last standard goal, it's really galling to see that my success didn't count and that I have to have another one in a thousand game.
I'm fine with there being some achievements for wizard goals. I'm just not OK with all of the future achievements being "complete all wizard goals." I don't stand a chance at unlocking more than one of those ever. (Currently I stand at zero across three copies of Gottlieb, three copies of Williams, and one copy of The Pinball Arcade over probably a hundred hours of gameplay.) At which point part of the reason for achievements disappears. I don't understand why they don't do a rotation - top 5 one table, standard goals one table, wizard goal one table, and so on.
I believe from watching other people play (and comparing my high scores to others online) that I'm an average pinball player - maybe even slightly above average. Not because I'm any good - I stink compared to you top 100 types - but just because most people stink much more.
EDIT: THANK GOD. Finally got Harem Multiball. Knocked off all the Theater of Magic standard goals too. Black Hole is now the only one left... I don't know if I will ever be able to do it, though.