Look, in vacuum, the idea leaves a bad taste in one's mouth. In vacuum, Ukraine is fighting for democracy as a concept, in vacuum it's trashy to ask for something in return for saving lives against a genocidal monster. But we're not in vacuum, are we? We're in a capitalist society where everyone has to think for themselves, and putting yourself first is not a bad thing (as therapy taught me).
One of our public figures put it really well: we do have these resources, and even if we'd start mining them ourselves, we'd more likely than not buy weapons with the money. Meanwhile russia just wants to steal these resources for free. So the deal the POTUS offers is not really that bad of a deal.
I am sure it'll play into russian “Ukrainians sold themselves to the US, REEEEE!” But get what. As a free nation, we can sell whatever we want to whomever we want. Meanwhile russsia is all about steal, appropriate, destroy.
Fuck russia.