Everyone I know - regardless of how they feel about recent police events - is pretty much in favor of police body cams. I understand that it can be quite expensive to equip every department in America with the equipment though.
Everyone I have spoken with in my Criminology classes, and at the police academy, and the police officers I work with, are in favor of, or ambivalent about, body cameras. I wouldn't call it a strawman argument because clearly as illustrated in the OP there is a force dead-
set against them, but hell if I know who it actually is. Some old-timey sheriffs with a lot of political power I guess.