I'm not sure I'd even like to draft a QB in R1 unless another Rodgers falls to Gutey's lap. Everyone expects sooooo much so soon, and so few deliver. If the value is there later, sure you draft a QB. And if he's going to be your starter one day, you now have time to groom him for the position.
Unfortunately today, it's all about "play now" for those R1 QBs because everyone sees them as a savior and so few can actually do it. If Mayfield, Watson, J. Allen, et al., had a full year or two of just learning, they would probably be a whole lot better for it. I doubt that even Rodgers could have carried the whole weight of a franchise as a starting QB his rookie year and been successful.
So, if you find "your guy" in later rounds, go for it. You lock him in for five years, sit him for a minimum of one year, find out if he's really The Man.