I think I'm missing something – what if somebody actually wants to get off in Amsterdam? Does the ticket come with a little asterisk saying "you're likely to end up in Antwerp"? Or are you talking about chartered or private flights?
I personally would be annoyed if I booked a non-stop that was expected to have s top by default but I guess if it works out a high enough portion of the time it doesn't really matter
You go to Amsterdam 99% of the time, only when the weather is bad you could end up in Antwerp. But that happens to "normal" non-replanned flights as well, if weather at the destination is bad they could also divert to Antwerp.