i definitely feel what may not be in our highest good in this moment can easily be in our highest good in another moment.
i've tried to use intention to get over physical illness, like a bug type of thing. didn't work even though i released any resistance to the healing that may have existed on any level. later i asked and it wasn't in my highest good to release the temporary illness at that time, i needed to be 'grounded' to integrate after a major release. so while i wanted to feel better, i had a longer run of feeling better by accepting the highest good issue because it gave me an opportunity to solidify the gains of the major release i had done (note - we don't always have to get sick to integrate a release, in fact we really never *have to* get sick... just my own experience in my own reality for this particular situation

).
i don't personally think it's possible - or wise - to try and manifest something that is obviously not currently for our highest good, but your preferences and such could be different. i wouldn't actually want to attract something that isn't for my highest good because our guides are aware of the context even when we don't have all the details... now yes, sometimes i purposefully ignore their take so i can act on my free will, and that's ok too, but i do think if it's a significant lesson we may even have told them at another level (before we incarnate for example, or at another level of consciousness) to block a specific manifestation because we'd miss out on a lesson that we've decided is very important to us.
so that's my take on it.