Interestingly enough the Navy has a patent to make UFOs that look real on radar and other sensors. [1] This seems like a good explanation as to why the Navy disproportionately has these sightings.

It is possible the people who have made statements don't know about this technology or didn't know it was being used. It would also explain why the higher ups don't seem to really care to find answers.

[1] https://www.forbes.com/sites/davidhambling/2020/05/11/us-nav...