We hear you, but it's not just a case of "That's your opinion and we think it's dumb, so we're going to punish you". It's more a case of how it's been suggested so much in almost every closed season/new ride discussion as a potential flat ride that Thorpe don't have yet somehow should have. Each time it arises there are plenty of reasons discussed as to why it would be a bad move: uncomfortable, out-dated, spectator ride, comparatively unpopular, Alton and Chessington both have one, etc., etc.
It's nothing personal, it's just that the proposition of a Top-Spins is getting ridiculously repetitive now and whilst enthusiasts and Thorpe don't always view certain things in the same way - particularly those pertaining to the park's attractions - it's a fairly safe bet that Thorpe won't be installing one, regardless of the demand.