Telling us that Lance isn't ready yet is exactly the reason why he should be starting. There is no such thing as "not ready," and some players need to learn while they play. That is especially true in this case, where Lance literally has one of the best rosters in the NFL around him.
How exactly is he going to improve and get accustomed to the game by holding a clipboard? I never understood that sentiment. The only reason not to start a rookie QB is if the team around him or the offensive line is terrible.
Lance hasn’t played a real season in almost two years due to the COVID-19 pandemic last year, so how would it benefit him to sit out for a second consecutive season? He needs to play football, period.
And not this two-QB system type of thing where Lance only comes in on some snaps and Jimmy Garoppolo starts. That stuff is just stupid, and if you have to use two QBs, you have no QBs.
Everyone always goes right to the Mahomes sitting a year story, but no-one ever says anything about how Allen started right away for the Bills and grew into a good QB.
Yes, he had his setbacks, but he worked on them and got better as time went on. Allen was also more of a raw talent coming out of college, so Lance can relate to him and how he developed.
His rookie contract is also an important factor here. It only makes sense to get the most out of the rookie while he is taking up almost no cap space, and also doesn't waste an entire year of his cheap contract.
The best case scenario for him is if he becomes a Pro Bowl caliber player obviously. When that happens, he will command a hefty chunk of the salary cap and the team won't be able to improve around him.
Do it now and get the most out of him on that contract with all these stars around him to help jumpstart his career.