MTT tournaments just have too much variance. Most players will never reach the long run when it comes to MTTs (in fact, if you don't play MTTs pretty much 24/7 for years and years you'll probably be stuck in the short run). This can be a blessing or a curse. For a WSOP
main event winner it's a blessing
I just absolutely HATE
the payout structures for MTT tournaments. They're so ridiculously top-heavy that you usually need to make top 3 to make any kind of reasonable profit. This means that you'll have to play a boatload of tournaments to get anywhere near the long run.
If tournaments had a fairly linear payout structure (8th place gets twice as much as 16th, 4th place gets twice as much as 8th etc.) I'd be much more willing to play them a lot.
As it is, tournaments give you a way to luckbox yourself into a lot of money quickly. But most of the time you'll spend a couple of hours playing and maybe make your buy-in back or something.