Because while I'd just run straight into the flaws of 4e in the worst way, I knew it was something that could be fixed if the devs would just work on it!
I recall having a real problem with my Death Priest. I'd invested heavily in Rituals so I'd have answers to any non-combat problem that came along. Right up until we were playing an LFR mod in Calimshan where we needed to cross a desert and I was like "oh, I'll cast this! and then that! oh and phantom steeds!", and the DM looked at me and asked if I could save my residuum because otherwise there wouldn't be any adventure.
Even the adventure designers had given up on pretending the game supported the exploration tier!