Exactly, now you've got it! The last caveat is that while methanol is slightly elevated in the heads, it's not meaningfully so. It's present throughout the run at nearly the same concentration. There just isn't enough methanol in a home brew to produce a meaningful early spike. And you certainly do not discard all or even a majority of the methanol if you toss the heads.

And this is why home brewing and distillation cannot cause methanol poisoning.