I know and I agree.
But in the case of the JAM, I'm assuming we're all devs here, gathering together to make games and play each other games.
It's definitely easier to play browser games, but I think we should make the extra afford in the case of the JAM. I didn't quite though about it, and I feel that my game could have got more plays if it was on browser. Didn't expected to be such a huge wall =/