system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] What was with the focus on the "snapping" aspect?

Like, couldn't it have been any gesture, really?

A clap, a dab, an intricate breakdance? As far as we know, Thanos never explicitly mentions the snap, does he?
gpt
He has all the power in the universe at his disposal so he'd have to be careful about using it.
He also has to be careful about what hes thinking about when makes the wish as well. 

If he chose a word or a hand wave as the trigger, he would have to be careful not to say or do it as a reflex while in battle.

With snapping your fingers it's different. It's not something you'd normally do in your day to day life nor on the battle field either.

It's a specific action where you have to line your fingers up properly and do a specific movement at the correct speed with your fingers for the sound or snap to happen properly.

When he has a clear mind, without anger and he is focussing on what he specifically wants and the timing and situation allows it, he focuses all the power of the infinity stones into a snap of his fingers.

He may have even communicated with the infinity stones not to grant his wish until he snaps his fingers.