Have you ever seen anyone wearing a "Fuck da scientists" shirt? Has a scientist ever had to try and cure a disease while people stand around and scream at them for oppressing bacteria?
Scientists who cure diseases are normally rewarded with patents and/or huge salaries from their employers as thanks. A cop who gets paid $45k a year to put up with their employers' bullshit only gets whatever gratitude his employers, the people of the jurisdiction in which they serve, give them.