Stats don’t really tell the whole story IMO. Lamar will do almost anything to avoid taking a risk with the ball or throw an incomplete pass, often to his team’s detriment. It is part of his hyperefficient stats.
He also uses his escapability to buy time, which makes a lot more of his throws to open receivers. Allen does the same thing, but he isn’t quite on that level of mobility, so he needs to do more pocket passing and throws into tighter windows.