My point was that players leaving MUFC when young virtually never go into to have top level careers and unfortunately Norwood doesn't disprove that.
I don’t think that’s a uniquely Man United problem. Top clubs produce hundreds of players and the vast, vast majority of them are let go. Statistically, 0.5% of players in academies will ever sign a professional contract.
Whilst Lawrence hasn’t had a particularly notable career in the grand scheme of things, he’s played in the top flight and been capped for his country. This is a lot more than what most academy players could even dream of.
And in regards to Man United players not making it- the exact opposite is true. In 21/22 Man United had produced 71 players who were playing in the top flight.
71.
This is 19 ahead of second place Chelsea and 25 ahead of third place Everton.
Manchester United are also the highest producer of players in the Championship.
Since your point was explicitly about players who left Man United early, here some other notable examples of players who were let go young and went on to have decent careers at top-flight: Paul Pogba, Ryan Shawcross, Josh King, Michael Keane, Gerard Pique, Danny Drinkwater, Tom Heaton, etc.
If you cast your net for how early they were let go, and what level of football can be considered ‘top’ then it looks even better for Man United. As it’s extremely rare to transition through from academy to professional football- players like Tom Lawrence, Oli Norwood, Frazier Campbell, Will Keane, James Chester, among others, have all had decent careers, even if not consistently at top flight level.
Whilst there will always be James Wilsons or Febian Brandys, it seems quite reductive to make sweeping statements on all these people as if they’re all moulded exactly the same, when there’s 108 Man United produced players between the Premier League, Championship and League 1.