False. it's a learning experience & self-education is useful.

True

Not exactly true. You may study Bitcoin.

You don't have to use it, but when you choose to do it, it feels so powerful.

False. That's the way to maximize your node, but even if you're not going to do that, running a node keeps miners and the network honest by still verifying that blocks meet consensus. This is why many bitcoiners run multiple nodes and don't use them all to verify transactions.