Well yes, the risk that is present is that if countries where to openly intervene and wage war against Israël, the US would intervene on the side of Israel.
Talking in the UN allows them to weigh their options, which allows them to make more informed decisions. Regardless of the subject matter at hand.
Look, of they show up with a smile and a get well soon package you make a very different impression even if it also serves as a check up.