That is a really silly take. The US has had "advisors" embedded with Ukraine forces since the beginning of the war. Multiple high level Pentagon officials (think multi-star generals) have mentioned in interviews over the years how valuable is the intel they have been learning and collecting from the war. I can guarantee you that somewhere in Langley there are many analysts constantly churning out reports about battlefield lessons and techniques from the Ukrainian war.

I like to think that there is core of career public servants inside the US government who take their jobs seriously and they perform it well. Whether decision makers take their inputs into account is a different matter.