I found myself thinking "no big deal, we are still stacked offensively...etc."
But this isn't the injury that will hurt. We aren't playing the Super Bowl next week. What it means is that when (not if) the next injuries come, we will have that much less depth to fill the voids.
Like, suppose Cooks pulls a hamstring and is out 6 weeks. Meanwhile, Gronk gets hurt (really going out on a limb there).
Then we head into the playoffs with a receiving corps that looks very thin. And as we've seen, if Brady only has one or two reliable targets, he can sometimes force things, and those guys get doubled. Life gets a lot harder.