It would make more “sense” to do something like that with ebola, anthrax, ricin,

Those agents may not have the properties which the cabal was looking for for this project. The coronavirus is similar enough to existing common viruses that the symptoms can be conflated. It's also got good properties of a long incubation period and high transmissibility so it's particularly hard to contain - justifying lockdowns.

It would make more “sense” to do something like that with ebola, anthrax, ricin,

It's just too obvious who has this and who hasn't so outbreaks can be contained. Don't think that the cabal hasn't gamed this all very carefully.