They don't matter.

The veto decides nominations. Initial nominations has no influence over final nominations.

F4 nominations matter because you are less likely to change you're initial noms that you have already thought good and hard about. It all comes down whether the HOH is more or less likely to change their initial nominations. I don't know how you could argue the HOH would not be more likely to keep them the same.

That is entirely dependent on whether he nominated or did not nominate his initial target.

However, given the initial nominations have zero influence on end-of-cycle nominations there is no reason for him to either nominate or not nominate his target. It has no bearing.

You're mistaken in making the assumption it has bearing.

You've been spouting this shit all night, calling people dumb. In reality, you're totally mistaken and have no idea what you're talking about.