You can say that every year about the QBs. Most of them play in spread systems which means they will not be ready to start right away.
Watson has a lot of elite traits, he has a chance to be as good as Mariota.
Trubisky is a smart player with a solid arm. I see him becoming similar to a Tannehill.
Kizer has and NFL arm, with NFL size. He shows a lot of NFL throws on tape. He is very raw, I don't know how he will turn out, but those type of guys don't usually work out.
Mahommes has a phenomenal arm, his foot work is terrible, accuracy can be inconsistent, and has never read a defence in his life. The guy is a gamer though, he could be similar to Stafford if everything works out perfectly. He is not even close to being able to play this year though.
That is four guys that have a chance to be a franchise QB. Doesn't matter if they are ready to play year 1, if they have a chance they are worth a round 1 pick. QBs probably have a 70% chance of becoming a bust. It will always be a risk but if you don't draft one you won't have one.
A sure thing comes along about once every 5-10 years. Luck was the last one, Darnold may be the next. He is obviously going to go number 1 next year and no one is trading that pick next year. The odds of us getting the first pick are about the same as us winning the Super Bowl. I don't see that happening. The other QBs everyone is raving about are about the same level as the guys we are looking at this year.
I hope Watson is there when we pick at 10, I am interested to see what Whaley does this year. If Watson isn't there I hope we trade down, I think you can get an equivalent prospect at 25. This is a very deep draft, we could use some extra picks.