Why are people so concerned about their boss's comfort?

The workforce has been tricked into believe that it is acceptable and normal for your boss to act like a jealous boyfriend when it comes to your job prospects.

An entrepreneur is always on the lookout for new opportunities. An employee should be as well.

Why doesn't the boss want you exploring options and developing connections? Because that reduces their power over you. They might have to pay you better and treat you better if you have the leverage of being able to leave.

This is why networking is so important, even if your job doesn't require it.

I talk to people all the time who are desperately scrambling for a job because they disassembled their job finding apparatus after they got their last job and now they are starting from scratch.

Don't do that. You should always seek to grow and maintain your network. You never know when you might need it.