Not true at all. Look at the team's QB situation for the past three season. It shouldn't be difficult to find a rookie QB that can best that level of play. Hell... Bortles, Bridgewater, or Carr were all available to this team in either the 1st or 2nd rounds a couple years back. Had they have taken any one of those guys we'd be talking about an entirely different Texans team today. The subject of Rebuild Mode would be even more irrelevant than it is now.
Basically what No Worries said. What worries me is that you think Lynch may be the exception that can play right away (if I read that right). He's the biggest project of the top three or four QBs and would be drafted more on potential than anything.
Lynch has the legs. If he's going to hand off 25-30 times a game he might be as "ready" as any of the QBs in terms of playing right away.
So, because he can scramble, he's the most ready? That makes no sense. That's in the bottom half of things I'd look at in terms of readiness. He played minimally. He's in a spread offense. Never really took snaps from under center. He threw a lot of quick passes, so you question his ability to read a defense. What he does have is potential. Great arm. Great size. Good mobility. He'll be drafted more on potential than basically any QB drafted in the top 2 rounds. If you want to talk legs, watch more of Hackenberg's film. He's got enough legs to pick up a first down. He's got better pocket awareness than Lynch as well. Not to mention he's already run our offense. Hackenberg, as a freshman 18 year-old running a pro system, beat a ranked Michigan in four overtimes in a comeback win,and beat a ranked Wisconsin with O'Brien at the helm. Lynch has nowhere near that résumé. Of course, Hackenberg had a better team, better system, and a better coach then. How much has been ruined by a bad system since. That's the big question with him.