Sure is.
You want Juniors aiming up , playing their way past someone.
If you're using Juniors as injury cover alone, or when there was an oversight in planning ( no succession ) you're going to go around in circles forever with incomplete players.
A young player, if they see that making first grade is just an exercise in biding your time , the culture of the club is failing.
Kids slotting into to FG having inherited positions are going to have an un balanced appreciation of what it means.....they get a sense of entitlement and are more inclined to believe their own hype.
You want these next generation players to learn the humility of the mantle being passed to them by someone they respect....not by an act of the coaches pen to fill seventeen numbers on a team sheet.