If that were the case any manager should just study what Klopp does and do the same. Why don't they?
Most of the players i.e. the midfielders? Sure. They're above average at the things you mentioned, but not particularly special, and Klopp's work on the training ground certainly goes a long way towards improving them in that regard.
But the forwards, they're magicians. How many times per game do we see any one of them receive a bad pass and bring it under control perfectly with their first touch? That's their secret ultimately, that's what allows them to play at that tempo with that quality. Salah's first touch verges on sorcery at times. All three are world class players, anybody claiming otherwise has never seen them play
I'm not arguing that Salah is bad player, he is a very good player. But while playing for the Scousers, even the likes of Origi, Ox, Gini, Shaqiri look exceptional.
For modern football, a great first touch(good technical skills) and quickness of thought is so invaluable for a player. That is why forwards like Lukaku will go out of the game soon. But for Liverpool's style of play, even more than their first touch, the most important factors are their movement as a collective and their tempo.
So many times, players like Mane, Origi, Wijnaldum etc. even Salah have taken a heavy touch, but instead of losing their threat, the gegen press they do as a collective, helps them retrieve the ball and turn back an unfavourable situation into a favorable one.