Here’s your reason
$$$ pure and simple.
Bookoo NIH bucks pouring into UCSF to do medical research.
“These people” in the street are simply disposable test subjects, fresh meat, to keep the NIH Grants rolling in.
No matter what happens to them through UCSF, they’ve got nobody to raise a stink or file a lawsuit after the fact.
If you find that a stretch look at Bayer and others involvement in Germany’s WWII Concentration Camps.