This is a requirement when it comes to teams nowadays and the Rams are very good at disguising what they're thinking. Could be I'm behind the curve with this story but I thought it was said Kupp seeking the opinion. Generally when that happens it is because he doesn't like what the team doc or the specialist they want him to deal with is saying. If he sought out an expert it means he's not happy with what he's hearing.
Now if the Rams are behind this then yeah maybe there is nothing to it other than them wanting to turn over every stone. But hamstrings are terrible. Because you never know where you're really at with them, and if you return too quickly you can be on the receiving end of a much greater loss of playing time. So even from the Rams perspective being careful with a guy as valuable as Kupp is going to be the plan.
Bottom line is I'd give it even odds wrt the short term IR. Would not surprise me in the least.