I'll say you two interpreted my post into something I didn't think possible! I'm going to start again.
My reasoning was that they were drafted later in what was a weak WR class. Not that it's impossible for one of them to succeed, just that the odds are against it. So I'm not really sure what it is you're responding to.
I start with this.
Let's say Jackson's defined his offense as a possession style similar to WCO with more emphases on the run game.
He wants two types of receivers one a vertical threat another a possession type. He likes receivers to support the run game. He biggest concern is ball control. I'm sure there is many more parameters we can list but keeping it simple.
Obviously the price is high for receivers with speed who create a vertical threat. Possession receivers are lest costly. Again, I am sure there is more factors but keeping it simple.
If you know the parameters, why does it matter if a player was drafted in a weak or solid class?
To take it further, your overall goal is having your team built in three years. If it takes receivers on average three years to develop, obviously you must place some emphasis obtaining talent early. You know the success rate finding adequate receivers is low. You take more improving your odds. A weaker class could be a factor why more is needed.
You can solve the issue rather quickly signing quality FA receivers. As an overall priority the team decided the bulk of their cap placed elsewhere. Paying a higher salary now on receivers restricts the budget what the team deemed more important.
I hope this makes better sense.