Why nobody plays the latvian gambit in elite chess even in Blitz ?

Is because all are normies or what?

I remember Pupols won Bobby Fischer with this opening.

I am 100% sure , someone would play this in Blitz against Carlsen and he would beat him .

I an expert in kings gambit and his reversed, the latvian gambit , and the last one is the most profitable opening i ever played in 20 years playing chess. 80-85% points .

I do not get It why the do not use this weapon, at least in Blitz games .

It is like Halloween gambit, very profitable opening, too i have 80% OTB

 Vachier Lagrave is the only Guy i know he promoted.

About refutations: 

I do not believe in refutations.

There are somes lines where the human oppoment feel uncomfortable ,  when i play latvian gambit as White i know these lines , but this is subjective .

@1

"I remember Pupols won Bobby Fischer with this opening."
++ Yes in 1955 Pupols won against the 12 year old Fischer.

"someone plays this in Blitz against Carlsen and he Beats him" ++ who, when?

"I an expert in kings gambit" ++ 'loses by force' - Fischer

"the latvian gambit , and the last one is the most profitable opening"
++ You can play it to profit from surprise effect, but objectively it is unsound

"Vachier Lagrave is the only Guy i know he promoted." ++ When, against whom?

"I do not believe in refutations." ++ Believe it or not, it is refuted.

It is not refuted , play against me , then you Talk about refutations 

@3
Practical play is different, especially bullet or blitz.
This is a correspondence game that refutes it.

I played that critical line many times , in database at least you must find one Game i played It.

The move 11..0-0, is not BEST, black must play quickly 10...c5 and find some counterplay for the pawn

Because it loses by force, and white has more than one ways to achieve a winning position.

Your suggestion (11....c5 instead of 11...0-0) has been tried, with the expected result.

Personally, i find the 7.Ne3 followed by Be2 plan more convincing, but I guess this is just a matter of taste: Black's position is miserable.

Some strong players (Dubov, Neiksans) have played the Latvian a couple of times recently, but only in online blitz events. In ICCF, only the Latvian GM Strautins has played this "recently", but he passed away 4 years ago. He was a world class flutist and music teacher.

The most profitable line against Latvian gambit is this move i recently played 30 minutes ago:

Ohhhhh so you lost on that

No they played me, i was White,  in the latvian books you do not find this tricky line

Ohhhhh I did now

If it was ever popularized at high levels, I'm sure the top GMs would just learn the refutation and it would no longer be played.