I don't understand why we need to run our own nodes to be using a DApp? Can they just run their own nodes instead?
The D in DApp stands for decentralized application, or more correct: distributed.
The idea is simple. Every client runs his own node to verify the blockchain, the smart contracts on it and everyting related to it on its own.
Would they provide their own backend or node, it would simply not be a decentralized app by definition anymore.
This benefits are obvious:
- trustless, because you can verify anything on your own
- unstoppable, because nobody can turn off your node