Sure, in some cases some things might be decided for you. Likewise, some real-life managers don't have full control over transfers. This doesn't mean that the negatives need to be something you build your game around.
There's absolutely no reason why you can't have at least some control over youth intake, training, match tactics, etc. Yes, you'd surely have less independence than an actual manager but many people enjoy the concept of missions and quests, not dissimilar to the aims that the board sets for you.
Your tactics etc. don't have to be decided for you. They can be akin to the philosophies a board requires of a manager, like "Play possession football" etc. The manager could tell you things like "I'm lacking in the defensive mid department, I want you to steer Smith towards a more defensive role", "Johnson is recovering from injury. He is a key player and I need you to prioritize raising his fitness over others", etc. but how strictly you follow these requests is up to you and how you generally manage your squad remains up to you.
Furthermore, in situations where you don't have control, methods can be implemented which give you the ability to either negotiate for control or behave in an advisory capacity. Like a manager has negotiations which contain issues like facilities and philosophies, you could have negotiations which contain youth philosophies and responsibilities. And like a manager gets advice from his staff, you could be the one to give that advice. He might come to you like "My right wingers are riddled with injury. I need to temporarily promote a youngster. Who do you feel is most ready for first team football?" And you tell him.
And youth intake? There is a ton of stuff that needs to be done, from scouting to making offers to contract negotiations, and in any of these tasks you can be in control or an advisor, depending on the club, the manager, and your contract.
There are a ton of possibilities feature-wise, but naturally I still agree that developmental issues are a likely stumbling block.