Good to see - airports must be courageous and stand up to them.
Either a route is viable or it isnt. There is no magic and markets cannot be 'rustled up' from nowhere.
If I was an airport MD I would much rather do a fair deal with someone like BE and work with them to build a sustainable network where everyone benefits rather than be held to ransom by Ryanair and have a network of non-routes with other carriers scared away.