I'm not sure what your timeline is. Lookman went on loan because Sam flatly told him he wouldn't play and he indicated he wanted to return to RBL but Silva flatly said no you're important to our squad and proceeded to play Bernard always. And for the production dropping part he produced an awful lot in Germany. I know that doesn't always translate but given Bernard produced nothing it's not like he could have done worse. The stuff about his training came out in March which was at least 6 months after it became clear he was lied to about his place in the team.
We screwed up with how we handled Lookman. Kean is different because DCL is actually good but the concept is the same in that a young player wants to play and that it neither a bad thing or a fault when they want out to do so.
I think there's a fair bit of revisionism here mate,
Lookman essentially left the club when he sent off by Allardyce. That was a mistake and Leipzig was a far better move for hom. I wrote this at the time, I understood his perspective and backed him up.
Where he went wrong, was he came back to Everton with the same attitude that he left- that we were being run by Allardyce and would not give younger players a chance. It was a mistake. Brands wanted to have him centralm in the squad, and so did Silva. In that pre-season he started games, and was on course to be 1st choice. Along wth DCL/Richarlinson they would have been the front line. Unfortunately, he didn't really want that, and he became a little pig headed and still wanted to leave.
As pre-season dragged on he lost his place to Walcott. Bernard then arrived.
In fairness to Bernard, it would also be unfair to describe him as "doing nothing" particularly in that 1st season. Bernard was good in a lot of games.
I agree with the idea young players want to play. Under Silva we had the youngest squad in the league playing games. Lookman wanted to leave, he didn't want to play. Kean wanted to play, but we couldn't drop another young striker who was just much better. In Kean's case it was unfortunate.
I do think we have to have some perspective, and we can't just fit events to suit a narrative. The Lookman situation was dissapointing, but it happens. The club made about 2.5 X what we paid for him for a lad that wanted away. We should have sold him the 1st summer Brands came for even more money than we did a year later.