The manager's apologists indulge his tedious whinges about City's superior transfer funds, overlooking that he has so far spent £300million moulding a muscular, archetypal Mourinho team he is failing to get a regular tune out of.
If that is what £89 million (S$160.6 million) buys, Lingard's value as a home-grown totem is even greater; only Lukaku has now played a hand in more league goals for his side this season.
United, who pride themselves on having one of the best youth systems in the country, finally have a true Mancunian, who has been flourishing on the big stage.
Lingard signed professional terms with United in 2011 before spending periods on loan at Leicester, Birmingham, Brighton and Derby in England's lower leagues from 2012-15.
However, United's legendary manager, Sir Alex Ferguson, stayed faithful and hopeful about the Englishman's potential, despite the criticism that was aimed at the young starlet back when he was just 19 years of age. "You can see in every training session and he's showing it in the games". He gave so much to my club that I can only thank him for that. He's nowhere near as deadly or prolific as the Tottenham goal-machine.
Former Liverpool defender Carragher praised Lingard's development under Mourinho. He doesn't smile enough or celebrate wildly enough to prove that he's glad to be at Manchester United, according to some.
But his manager is unfazed by that and feels he has finally arrived at the big stage.
Speaking after Saturday's 0-0 draw with Southampton, Scholes said: "He doesn't look like a player who will win you games - that's what you pay £90m for". We had to stop him to play because he was saying, 'I feel awesome, I should go and play, ' but... we decided not to play (him).
"Some players aren't capable of that jump. Today, I think we did". He's more consistent, understanding the game and different positions more. "He is going in a good direction".
A hard festive period for United had threatened to get worse on Monday.
Ahead of United's 0-0 draw against Southampton in the final game of 2017, Gary Neville addressed a crowd at Hotel Football during the prematch meal. Lingard is giving that jump.