JB's sacrificed production to be on this team. It's a part of being on a winning/contending team with structure and defined roles. He knows that he can produce more and is limited due to his role.
Jaylen's been top 12 in FGA's for the past 3 seasons, so he hasn't sacrificed as much as he might think he has, but he has. Some seasons more than others, but I would guess Jaylen's sacrificed around 10-30% of traditional and advanced stats plus accolades. With Siakam and Randle having been recent All NBA selections, advanced stats undervaluing non-bigs and non-first options, and a younger comp like Jalen Green averaging more than Jaylen did until his 5th season, it's clear that JB's sacrificed to be on this team.
Brogdon's experienced both sides of the coin as a young role player on a contender and first option on a lottery team. That is part of the reason that it's great to have guys like him and Al on this team to give Jaylen their experience on how winning and contributing to a winning team in your role is greater than being the best player on a losing team.