Not all people are like you or us who easily understand bitcoin, there are others who even though they read the simple meaning of bitcoin and its function, there are others who do not immediately grasp what they have read.
There are others who have a fast pickup of understanding and there are others who have a slow pickup of understanding. So we cannot blame them, that is why it took some months before they really understood bitcoin because they tried several times to understand it through their readings, watching youtubes in their language, Although what you are saying is correct. But we do not have the same level of understanding.
People can use Bitcoin without much understanding about it. If they can do a bank transfer, they can do Bitcoin transaction, not big difference.
Even they can use Bitcoin blockchain and their bitcoin well without much knowledge but it's risky and also not recommended. Spending their time for learning basics of Bitcoin is recommended. Basic things like what is private key, mnemonic seed and importance of it for security of their bitcoin. Non custodial and open source wallet is important too. How to backup a wallet and recover a wallet. How to receive and send bitcoin with non custodial wallet.
I believe all these basic things are very basic, not hard to learn.
How to back up a seed phrase?https://learnmeabitcoin.com/beginners/