Absolutely.
One of the main key points of Bitcoin is the decentralization of it.
Anything that is centralized should not be seen as beneficial for Bitcoin or the people using it.
I think it's just the fact that most people just want the convenience that comes with centralization, but that's a bad trade off.
Obviously. For most, it's more about popularity and what is common in an individual's locality. Not necessarily learning how to use it but, you must first discover it before hoping to understand.
For others, it becomes a question of, not being able to manage there security. Not having hope of any password or private key once misplaced or forgotten sounds scary and so, they hope on centralised exchanges to give them a backdoor through to password recoveries.
Unfortunately, there would always be vulnerability when you operate this way.
If the idea of cryptocurrency revolves around escaping centralisation or having an individual or organisation at the apex of your financial activities, why run to another one in the form of centralised exchanges! It doesn't make much sense to do that.