The "kill it all" approach kills all the beneficial ingredients that people need.
Like most food processing, cheaper and legal beats value and effectiveness.
These food producers would have you eating plastic - oh wait, they already do.
There isn’t that much beneficial in commercial milk to worry about. Unpasteurized milk is becoming legal in more states, does that make it less enticing ? Personally I wouldn’t buy it outside of fermenting kefir. The govt simply can’t afford to subsidize small farmers to pay extreme attention to hygiene standards.