> It's ridiculous to think that helping you build a successful career, which likely doesn't involve them or your current employer for very long, is something that they would do.
This is a very short term perspective. If I am a good manager to you, you are much more likely to stay because that’s an important relationship & you are benefiting. If it means you move on because I helped you gain the skills/confidence you needed, great, maybe sometime down the road you can help me when I’m looking for me next job or refer my next awesome employee. But who cares, at least neither one of us had to be miserable.
You always have to be _cautious_ but don’t let relentless cynicism keep you from good useful professional relationships that can actually help you.