You have a valid point. I don't think it is overrating so much as the belief that there are other units that need attention more than WR.
It's no secret that this is the first season in a looooong time that we actually had a legit #1 receiver, so for someone to say we have a "great" WR corps is disingenuous, or homerism wishful thinking.
On the other hand, it's not unreasonable to have the opinion that there are greater needs.
It's also not unreasonable to say the receiver corp would look better if the Miami QB had as much time or as good a running game as KC, Houston, Baltimore, SF, NO, and Tennessee