Age 19: 6.8 points, 4.4 rebs, 1.9 assists (He sucks; he's not even average. What a waste of a draft pick. Whatever).
Age 20: 12.7 points, 6.7 rebs, 2.1 assists (He's an average bench player. Who cares?)
Age 21: 16.9 points, 7.7 rebs, 2.6 assists (He's an ok starter. Maybe he's a legit starter one day).
A young player today is not the player of tomorrow. If you think differently, ask Giannis Antetokounmpo.
For every cherry you pick, I can come up with something better.