Building web3 app with centralized database along blockchain? Will against the idea of Web3?

I'm working on a project for online interactions using Web3 technology. The problem I'm dealing with is that users have many options like making posts, commenting, upvoting, checking views, and more. But these actions can end up creating a lot of records on the blockchain, which also means higher transaction fees.

So, I'm thinking, what if we use regular databases like Firebase or PostgreSQL for most of these actions, and only utilize the blockchain for specific transactions?

However, I'm wondering if storing data address and transactions details on centralized databases goes against the core idea of Web3. Would this approach affect the main concept of Web3.0?

And if only addresses to store on centralized database and transactions details on blockchain?