The best case for Fields in terms of early playing time is that he wins the job next year. What the fuck are you talking about? Lmao. Even if he doesn't, there are levels between "started as a true freshman" and "waited till he was a senior to play". Maybe he sees the writing on the wall after two years and dips. Maybe not. Georgia was where he wanted to be. Maybe he thinks he'll be good enough to start as a true or redshirt frosh. Maybe he doesn't and doesn't care, because he thinks UGA will best prepare him for the league, even if he has to wait in the wings for two years.
Onlookers thinking recruits are thinking "start instantly or bust" and refusing to acknowledge there's more at play for them is weird. There's more paths to the league than that. I'd wager most NFL QBs didn't start as soon as they got on campus. Best QB of all time sure as hell didn't.
By division
Tyrod Taylor 4 year starter
Tom Brady 2 year starter, (5 pass attempts as freshman)
Josh McCown 3 year starter (left after junior year)
Jay Cutler 4 year starter
Ben Roofiesburger 3 year starter (left after junior year)
Joe Flacco 6 pass attempts as freshman, transferred
Andy Dalton 4 year starter
DeShone Kizer 2 year starter (did not play as freshman)
DeShaun Watson 2.5 year starter (left after junior year, only started 8 games as freshman)
Marcus Mariota 3 year starter (left after junior year)
Blake Bortles 3 year starter (left after junior year)
Jacoby Brisset played 8 games as Freshman, 5 as sophomore, transferred to NC State where he started for 2 years
Alex Smith 2 year starter (only 2 games as Freshman)
Trevor Siemian 3 year starter (played in 8 games as Freshman, 26 attempts)
Derek Carr 3 year starter (14 attempts as freshman)
Phillip Rivers 4 year starter
That's just the AFC, but it seems like most starting NFL QBs started for 3+ years with a few exceptions.