No Dozza, you're not being too cautious. Ideas like this are constantly being dreamt up by desk-driving gimps to save fuel or whatever, and improve bonuses for said management monkeys.
Once data about increased brake use (higher landing speeds) becomes available, or a tail-strike occurs for exactly the reason you suggest, then they will invent another policy to 'improve company performance'.
I'm surprised they don't ask for glide approaches!
