what does this mean? that the sender sends a direct message to the receiver, this does not go through filters and nobody can alter the message

You have stated an important part of the blockchain.

Some people think that as soon as they say information can be accessed by anyone and everyone it means even a user who doesn’t want people to see his messages cannot so anything about it which is not the case.

We actually have types of blockchain and one of these types allows a user a encrypt his message and in this case only the receiver has the key which I he can use to access and read the message . Without this key it means the message cannot be accessed.

Independence in terms of transactions as you can do them anywhere in the world at any time

Yes and apart from anywhere we can take note that banks do not work on weekends but blockchain even works In our dreams😂.

who do not trust the blockchain due to the extreme community of pirates who create coins or tokens to defraud this has to do with attacks on the blockchain so that millions of people stop trusting it even seems like a conspiratorial act I dare to say.

The decentralisation feature of the blockchain has allowed anyone to do what ever he or she wants. So it is therefore up to the users to take time and study the project they are investing their money into. Mostly a project Turns out to be bad if it doesn’t have a white paper.