Only you can weigh the risks. Encountering filth is an everyday part of the job. After several years as a narcotics officer,I found there was always a dirtier doper house than the last one. Exposure to chemicals, rotting things, body fluids of addicts and severely ill unstable people were almost "normal" for the nature of the job. Groundfighting with paranoid meth heads, or worse a doper fired up on PCP, will involve contact with body fluids very close and personal. Dopers also bite, ever seen a "meth mouth"? Only jobs that may get closer to it, outside a medical facility, is Firefighter/EMT, and Corrections.
Sworn officers work the street and that is where the action and bio-hazards are. You may be quite suited for LE work in many other areas, consider those. We need good people in support roles.
Your writing suggests you have good writing skills and you are intelligent. Have you ever considered getting a law degree and becoming a Prosecuting Attorney? The big bucks are not there, but you will definitely make a difference. You will share our satisfaction (and low pay - lol) in a team removing some real scum from society. Cops pick on lawyers a lot, but we cannot put the scum away without effective Prosecutors. I worked several years with a full time Prosecutor assigned to a regional drug task force. He was ruthless in court, and he liked to go to trial. In trial he was creative, strategic, prepared, and most of all, he got convictions.
Think about it.
Old people may not live to see the collapse of our Nation. The rest of you may not survive the collapse.
A lie told often becomes truth. (Valdimir Ilyich Lenin)