Shall I do X for Y?

I don't think anyone will understand this. If I share this with reference, maybe then it would make sense. For now, I am trying to make a decision. 

Should I do X for Y? Should I do when Y should be doing? Why should I do?

Because I can, and I know Y should. But does Y want it? Does Y want it bad? I know you want it; I am sure if you want it badly. However, I am certain that X might be the best for Y. 

How certain am I? There is nothing that can go wrong doing X. Is it? Well, most variables are under control. Give me numbers, I love numbers. We can't be accurate, but everything controllable can be controlled here. Let's say 80%. I would have said 90%, I am giving out 10% room for errors. More buffer. So, I am 80% certain Y will have a great time doing X. Concluded from the fact that Y has an 80% chance of making it. 

Is 80% good enough to do something? If it were me, surely it is greater than 50%. So, in a very basic game of choice, it is a good choice. But there are more factors - Y is already doing Z, and Y only has n% of percentage will to do X. 

Let's redo the math. In a basic choosing game, while choosing between two things or n things, you choose the one you want the most. One that makes the most sense to you. Each n has various factors. Here I am calculating - How much Y wants both choices. And I also have an option to play a part, influence this choice, why, and when I should intervene. 

If I assume Z is constant, which is, in this case, because Y knows Z and I know Z and we agree on it being a constant. As in any case, Y loses the benefit of having Z. The Same benefit will always be there. Important variables are how much Y wants it. Yw, Delta of X, Xd. 

So it's more of a question, how much better X is for Y, compared to Z. It is always better, number-wise, it is -

Xd Yw = .8  * (Yw)

If Y doesn't want it, then it is 0, if Y wants it 100%, then it is for sure 800% better. It is an 8x jump. No brainer to do it. 

I should do this. And the question I shall ask here to Y is - Do you absolutely not want it?

 Combine this with a framework to make decisions for yourself (pseudo math).