Interesting that none of the responses answered my question.
Even if, as Phren says, Bullet is not chess.....
Why have pre-moves? Why not make the game entirely the result of human manual decisions under excessive time constraints?
Your story has touched my heart.
So let's tackle the unanswered part of your question head on, okay?
Often, a player will make certain moves in the opening with very limited variations.
(It's not they are mindlessly approaching the first few moves, it's just they've found an opening system that works for them and they repeat it complete with proven responses to the most common move replies.)
So to free you up from having to wait on those "already anticipated" responses and waste time in the process, your premoves feature provides you...
-- the convenience of being able to automate the moves in advance.
Now, mind you...No one "forces" you or any other player to use this option...
it's just provided as a beneficial feature for those who do wish to exercise it.
So if they already have a dependable system of moves in a given situation, they can now simply make a few of them in advance and not be punished by having time deducted when they already had them prepared anyway.
So basically, use them if you want.
Don't use them if you don't want to.
It's completely up to you and in your control as an option provided.
It's not exclusively limited to the opening either.
If you've ever played turn based games here on Chess.com then you may be familiar with a similar feature called "conditional moves".
This is where you can preset automatic responses to your opponent's moves on the condition they move where you anticipate.
It's the same principle at work for you.
Basically premoves, like conditional moves, is strictly an optional feature which can benefit you if you choose to use it correctly.
Can it provide you an advantage?
Certainly.
Like most tools designed to automate manual tasks or make life easier in ways like that, the one who learns to use the tool skillfully can wield an advantage over someone who has determined not to learn because they don't like it.
However, the same person who was once "anti-tech" as of yesterday, could today begin to take the time and practice to learn how to use the tool and enjoy the same advantage of possessing a practiced skill if they so decide.
So now you have the scoop on premoves.
I hope it helps you and others who may have wondered the same thing but just didn't ask.
Now as far as choosing how you'll avail yourself of this knowledge or even use it at all...
It's your move!
Interesting that none of the responses answered my question.
Even if, as Phren says, Bullet is not chess.....
Why have pre-moves? Why not make the game entirely the result of human manual decisions under excessive time constraints?