I don’t agree. Users can be in a hurry because they have to catch the train. They can have only one hand free because they’re holding a baby. They can be mentally handicapped so they’re cognitively unable to google stuff. They can be depressed and find themselves unable to accomplish even small tasks. Or they’re blind and there’s no accessible website that explains the error.

I think all those people have the right to use your app.

There’s a point in drawing a line somewhere. But please, don’t make your app hard to use /on purpose/, not even with good intentions in mind.