Covid-19 virus originated in Wuhan "wet market", where freshly-slaughtered wild meat is preferred. It's a perfect setting to facilitate virus movement from animal to animal and from animal to human.
Even if it is so, Chinese way of living is not just that market and people are just being racist. If there is a specific thing wrong with that environment (I'm not the one to tell), it needs to be dealt as a single case, not by talking down the way of living of billions.
https://www.theguardian.com/environment/2020/feb/25/coronavi...
And it happened before, with SARS in 2003:
https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndr...