Vickers' dive-bomb sight and Air Ministry priorities

Why did the Air Ministry object to Vickers developing a dive-bomb sight with its own money?

The objection concerned scientific and engineering time that the ministry wanted devoted to other work.

Private funding did not remove the dispute over how Vickers used its scientific and engineering staff. In this account, the Air Ministry wanted those hours spent on its own priorities. The exchange also connects the sight to an aircraft design with room for it in the Fleet Air Arm fighter program. The wider financing of 1930s development is described as opaque.