Could say the exact same thing about ODIs. You don't score 400 runs from grounds with proper boundaries. Any game that has 350 plus runs each innings has little ebb, flow or character.
The thing people seem to forgot is there is next to no contest these days between bat and bowl in ODIs. Alteast in Twenty20 the joke of contest is over in 40 overs and not 100 overs of watching batsmen have batting practise. The only true form of cricket that has a contest between bat and bowl is Test Cricket and even that is limited these days. ODIs and Twenty20 both have screwed contest between bat and bowl. I wish some posters start to wake up to this fact some time soon as they are becoming very boring right now.
Couldn't disagree more, really. There is a contest between bat and ball in 50 over cricket. You see attacking fields, attacking bowling, sides being bowled out, sides losing early wickets then recovering to make a good total, and the opposite. While those sorts of things can happen in 20/20, it's on such a different scale that there's simply no significance to it. A team who loses wickets will either change absolutely nothing and the wickets will be irrelevant, or if they lose enough wickets to make a difference the game will be dead as a contest anyway, like in the Australia v Sri Lanka game recently. Wickets are essentially a hiccup in the run rate, they aren't a means to an end for the bowling side, therefore there is no desire from the bowling team to bowl out the batting team and no contest between bat and ball.
And really, it's quite absurd to argue that ODIs have a reduced contest between bat and ball because of the limit in the overs and the focus on rapid scoring, and then suggest that 20/20 is no worse. Naturally, limiting the number of overs brings the focus to batsmen, and the fewer overs you have the more batsman define the game. The shorter the game, the more defensive the fielding side has to become, because the less chance there is of having success with attacking cricket. If you had a game of 9 balls it would be impossible to bowl the batting side out, therefore the entire contest would be which batting side could get closest to 54 runs, and the difference between a dot ball and a wicket would be precisely 0.
I hate the 400 v 400 type ODIs that you mention as well, but they are few and far between and only occur when the bowling is absolutely horrible or the conditions are slanted way too far in the batsman's favour, ie a flat wicket and a tiny boundary. Essentially, every 20/20 game is one of those 400 v 400 ODIs, just shorter.