Yes, that’s a healthy way to handle normal interactions.

However if you are being harassed by someone you don’t want to interact with them.

Often times blocking informs the other user which has been shown to just make people resort to other means.

There is practical application of not responding being better in some situations.

In normal human interaction, be good to each other. Ghosting is awful.

I don’t think this is intended for ghosting people though.