I knew you'd bring that up. And Colston was a 7th round pick. But those are the exceptions, not the rule. If it's so easy, why haven't the Saints been able to find a good backup to Kamara going on several years now? Why can't they get descent receivers?
If it's 4th and goal with 3 seconds left in the game and the Saints are down by 4. They win and they're in the Superbowl. Would you rather the ball be in the hands of someone like Jeanty or Joe Scheaux RB? How far did the Saints go with a solid O-line, a HOF QB and nobody receivers? A great O-line can get you far. It can make average players look better than average. But not as far as a game changing player that can take over a game like Reggie Bush in the playoff game against Arizona, or Kamara in his 6 TD game. In the playoffs, the other team has a pretty good D-line too. You need more than Joe Schmaux players at skill positions to get further in the playoffs. And it's a lot easier to get those players in the top of the draft. I'd rather get one now rather than have to try to trade up for one later.