The difference of putting "for" and "to" at the beginning and

Hello everyone.

My question is why we can put "for" at the beginning but we can't do the same thing to "to" in such a dialogue.

-Are you ready?

- I am ready for the meeting, but for the the party, I am not ready.

I think this putting for at the beginning is acceptable and not terrible.

But how about this one?

- Are you ready?

- I am ready to go to the meeting but to attend the party, I am not ready.

I think this one is really terrible, and not acceptable. But why?

Do we have any reasons to say that "for" is acceptable while "to" isn't?

Thanks.