Not really how it works, mate. Not everyone is a Haaland or Ronaldo. Strikers below at 20 years of age:
Cavani: Scored 5 goals for Palermo in Serie A
Van Persie: 5 goals for Arsenal in PL
Lewandowski: Playing in the Polish league
Van Nistelrooy: Barely scoring for Heerenveen in the Dutch league
Drogba: Played for Le Mans in French league 2
Vardy: Fleetwood Town
Watkins; Exeter City, 13 goals in League Two
Toney: 6 goals for Shrewsbury in League Two
Gyokeres: 6 goals for St. Pauli in 2. Bundesliga
The harsh truth is that neither of us have any idea how good a player can become or what to look after in potential. We are not scouts, and with good reason, so stating things like you do as a fact is a bit silly. If you watched Drogba at 20, you'd laugh at the idea of him becoming a great striker who turned up in the absolute biggest games time and time again. Things aren't always as black and white as "if you're good, it shows at 20".