Think you forgot a little caveat:
"I'd prefer that China build the most dominant and capable armed forces the world has ever seen before taking back Taiwan."
I think this alone illustrates how foolish that notion is.
are you saying the PLA in its current state is able to invade and occupy TW under full US intervention and global redeployment? if that's the case then there's no point in trying to go any further because it seems we disagree on even the basics.
i don't think it's foolish to "expect the best outcome but prepare for the worst", in fact it'll be wise to do so.
unless you are suggesting that no matter how much china prepares it simply cannot match the US, even in the next 30 years?