There is some amount of controversy of the EHT imaging process because there are pretty strong priors backed into it (like a lot of modern physics observations,

There is some amount of controversy of the EHT imaging process because there are pretty strong priors backed into it (like a lot of modern physics observations, e.g. LIGO)-- and at least one group suggests that you get a similar looking donut observation if you just feed noise into their imaging process.