On that basis it could have also been attack to discredit China by CIA or like... Release pandemic from China then politically and economically attack them. Entirely something reasonable to consider considering history of USA...

Absolutely valid point. This theoretical scenario could be anyone that believes they stand to gain from this event. I updated my comment to reflect your point.

> This is of course a lazy theory and would be nearly impossible to test out.

Even this hypothetical theory doesn't explain the early lineage A / lineage B split and is not supported by existing data.

I have my own weak hypothesis regarding what you mention but I don't have anything really to back it up. Lineage A could have been the compromised tech and lineage B could have been an intentional engineered release that is more contagious but less lethal to improve morbidity from A and reduce or mitigate the fallout, not that anyone would ever admit doing this to the general public.