In London generally on-street parking is already at- or over-capacity, so adding an extra couple of hundred to a thousand people wanting to park their car in the surrounding 3 or 4 streets is not just NIMBY-style petty complaints of "I don't want someone parking outside my house" and so on, but more "there physically isn't enough space for even more people to try and park in the already over-capacity on-street parking - get a reality check, this isn't going to work".
I think there is a difference between those two responses