I don't think it's about "hating", it's about legitimate concerns. We only have 5 picks. We gotta make 'em count. If we were the 49ers coming off of a Super Bowl appearance and having 14 picks to play with, it'd be more tempting to roll the dice on a prospect like Patterson. We just have too many holes to fill and too few picks to do it with to take such a big gamble.
Why is it a gamble? This isn't a playoff team right now and it isn't close to being one. There's way to much of a lack of talent at key positions. There's issues on the OL at RG and RT, there's age and health issues at LT. There's issues at LB with health, there's issues in the secondary with no starting caliber players at all at CB or safety. There's a lack of a starting caliber DT on the team as well. WR talent is shallow and the one good player is a getting old. There's question marks along the coaching staff and what the direction of the team is going forward.
Oh and then there's the flat cap and a group of 5 that take up an increasingly large part of it over the next few years.
It's development and rebuild time, there's nothing wrong with taking a wr that's going to take time to develop when the whole team needs a huge talent influx and it's going to take a few years to replace the damage done by the lockout and previous poor drafting.
Starting RG, RT Future starting LT
Starting WR, future wr #2 or slot receiver.
Starting DT, Starting NT, future starting DE plus depth all across the line.
Starting caliber backups at SLB and WLB, depth for ST
An entire starting caliber secondary
There's too many holes to think this is a playoff team and this draft isn't the one to replace most of them with. It's weak as hell and there really isn't too many sure fire things in the draft. No DT's, No OL, No CB's or LB worth a 14 pick that are expected to be there. You simply have dream scenario's of some one falling that's a top prospect or take a chance on a safety or WR really at 14.