Why not 6. dxe5?
help with KID



I have a different approach. Not the best lines in the world but we're playing against humans anyway

whoops!!! meant like this...
You may want to explore options that deviate on the 5th move instead of playing 5.Nf3 0-0 6.Be2 e5. Black's plan against the kingside after 5.Nf3 0-0 6.Be2 e5 is very natural and easy to play. White normally plays on the queenside, but needs a very high level of skill and precision to implement plans on the queenside, while needing nerves to hold the kingside.
Unfortunately for most of us regular normal players, the King's Indian is something that much harder to play as white as compared to black.

Taking the pawn is indeed not good because of the trick Blue Emu pointed out.
But if you really hate closed positions, you can still exchange on e5. You don't have to follow it by Nxe5, which is where the position goes worse for White. Without doing that, you can still get a less closed position, albeit a pretty equal and boring position. But if you like that kind of thing...
Or you can learn the fun things to do in the actual King's Indian...
A couple of other, less boring options: you might consider the Saemisch or the Four Pawns Attack -- in both of these, the position often doesn't get as closed as in the Classical.

7.dxe5 is entirely playable, and Black must respond with great accuracy to equalize.
https://www.chess.com/news/view/li-chao-convincing-winner-neckar-open-8157

My personal recommendation is something like this:
I've had some success by completely avoiding the main lines like this. Just play simply and not much can go wrong.

My personal recommendation is something like this:
I've had some success by completely avoiding the main lines like this. Just play simply and not much can go wrong.
This (the Smyslov system) is advocated by Yusupov in the third volume of his "Build Up your Chess" series.
Once you understand the positional details, it is a good way to play without paying too much attention to theory.

My personal recommendation is something like this:
I've had some success by completely avoiding the main lines like this. Just play simply and not much can go wrong.
This (the Smyslov system) is advocated by Yusupov in the third volume of his "Build Up your Chess" series.
Once you understand the positional details, it is a good way to play without paying too much attention to theory.
tnz prob use this and i just saw it in ben finegolds cource on 1)d4
how in the world do i open position as white??!! n
im a semislosed kind om guy(queens gambit ect.)
and this closed position drives me crazy and taking pawn is common so prob not good
(not only this exact position)