Why I am ok we didn't draft a d-lineman in the first round

I'm not that happy with our Choice. We have many major needs on our defense that needs to be meat, if We are going to be competitive with the 49ers,Seahawks,Teaxens,etc. We need players who will Protect Drew from being knocked the hell out and on the other hand players who can get after the QB, with no problem. I Felt we could have gotten one of those players last night,but did not. Now we will have to waite until Sat,to see if we get the right personnel for the Positions, we need filled the most. Just not a good start,when we have limited draft picks.