I don't think the WHO is trying to get people sick, or that China is doing this to the USA, or anything like that. I do think that something doesn't smell right, but I'm unwilling to make any kind of conclusion on what it might be.
As for the person-to-person thing, I lived through the storm of data and information and distinctly remember them claiming there was no evidence of person-to-person transmission after I had seen multiple bits of evidence out of China. To prove that, I'd have to do a lot of wayback machine work.
People have been contagious before symptoms and also without showing any symptoms. I thought this knowledge was widespread at this point. The 3rd case and 5th case in NZ were a couple where the 5th case (wife) travelled to Iran. The man got sick after she returned. She was not sick. They tested her and she was positive and became the 5th case. https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&object... https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&object... Probably sexual transmission, so not too suprising. But there are many other reports which the CDC acknowledges on this page: https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-si...
The question on ACE/ACE2 has references itself: https://www.thelancet.com/journals/lanres/article/PIIS2213-2...