This is not how good managers think. They're not building good employees, they're helping build incredible team members. This isn't some altruistics BS, it's because the attributes of a great employee are symptoms of the indvidual. If your manager only cares about your bottom-line impact towards your job, start looking for a better situation.
I will absolute do what I can to grow employees. But they have to want to do that. Not all employees want to climb the ladder. They do not want to become a manager, they do not want the responsibility that comes with lead or architect roles. That does not mean they cannot grow in their position. You can always improve your coding, automated testing, devops, not to say soft skills, learn a new framework etc.
