Career goals at 21:
Liam Delap: 16 (12 Championship, 1 EFL Cup, 3 EFL Trophy)
Ollie Watkins: 36 (23 League Two, 10 Conference South*, 1 FA Cup, 2 EFL Trophy)
Ivan Toney: 29 (11 League Two, 14 League One, 1 FA Cup, 1 EFL Cup, 2 EFL Trophy)
Dominic Calvert-Lewin: 23 (5 Premier League, 5 League Two, 6 Conference North*, 1 Europa League, 4 EFL Cup, 1 FA Cup, 1 EFL Trophy)
Danny Ings: 21 (6 Championship, 8 League One, 4 Conference South*, 2 FA Cup, 1 FA Trophy*)
Elijah Adebayo: 21 (15 League Two, 1 Southern League Premier*, 3 FA Trophy*, 2 Burks & Bucks Senior Cup*)
Michael Antonio: 18 (1 Championship, 3 League One, 7 Isthmian Premier*, 2 FA Cup, 2 EFL Trophy, 3 London Senior Cup*)
Jamie Vardy: 14 (10 NPL Division One South*, 3 NPL President's Trophy*)
Carlton Morris: 10 (8 Scottish Premiership, 1 EFL Cup, 1 EFL Trophy)
Dominic Solanke: 8 (1 Premier League, 7 Eredivisie)
Callum Wilson: 3 (1 League One, 2 Conference Premier*)
Asterisk indicates non-league competition
The idea that Delap doesn't have the potential to become a Premier League striker is just untrue. He's clearly amongst these PL strikers and is playing at a higher level than most of them were at the same age.