Well, it depends, Alliance also brought a lot of different strats in the past 6 months, it's just that they fell back on the rat doto to be more consistent. Navi just dies. Although trained eye can probably see their killing sprees coming like a minute before they actually start rolling through the other team with acquisition of key items and so on, it looks much more impressive to the laymen, like me.
There's also a big difference between getting an advantage straight up by killing the other guys, or relying on something rare and difficult to predict, like lvl 1 rosh or the veno wards denying. Yes, you do what you can to win, but it still doesn't look that good. If you show that you can get an unusual item and use it in a way nobody thought of before in a comp game, you also get huge applause, like the blinkz from EE.