It's not like they're creating the diseases for no reason:
Some scientists are eager to pursue these studies because they may show, for example, how a bird flu could mutate to more easily infect humans, or could yield clues to making a better vaccine.
https://mobile.nytimes.com/2017/12/1...ww.google.com/
I don't have a problem with them experimenting on diseases as a means of better understanding potential future risks, at least based on my limited knowledge of what they're doing so far. I remember people being deeply worried about bird flue transferring to humans several years ago.
Bird flu has been striking chicken and turkey farms in parts of the West and Midwest. This past week, it hit a flock of millions egg-laying chickens in northeastern Iowa. Update 4/22/2015: The USDA now says that around 3 million birds were affected in the Iowa facility — down from a previous estimate of 5 million.
https://www.npr.org/sections/thesalt...zzles-industry
And it's deadly to humans and to other mammals that catch the virus from birds. Since the first human case in 1997, H5N1 has killed nearly 60% of the people who have been infected.
https://www.webmd.com/cold-and-flu/f...out-bird-flu#1
There have been a few cases where one infected person caught the bird flu virus from another person -- but only after close personal contact. So far, there has been no sustained human-to-human spread of H5N1.
https://www.webmd.com/cold-and-flu/f...t-bird-flu#1-3