It’s a fat in low fat milk that’s bad for you. Sure, if you don’t mind that they find that the fat in milk can make prostate cancer more aggressive, it’s your overall survival. You’re drinking a lot of that milk. and it is not recommended by the experts.

If you keep it up your PSA may not stay down. I am 77 and I sure wouldn’t do it. Here are some evidence and there’s a lot more. The AMOUNT you are drinking is really unsafe.
https://news.llu.edu/research/new-study-associates-intake-of-dairy-milk-with-greater-risk-of-prostate-cancer
Our findings add important weight to other evidence associating dairy products, rather than non-dairy calcium, as a modifiable risk factor for prostate cancer,” said Gary Fraser, MBChB, PhD, the study's principal investigator and professor at Loma Linda University School of Medicine and School of Public Health.
https://www.healthline.com/health/prostate-cancer/milk-prostate-cancer#research
Research has shown that men who consume a lot of milk are more likely to develop prostate cancer than men who don't eat calcium-heavy diets. An older study ® published in 1998 found evidence that men who drank more than two glasses of milk a day were at higher risk of advanced prostate cancer than men who did not consume that much milk. Whole milk seems o to cause the highest increase in risk, although studies have also found a GREATER RISK ASSOCIATED WITH LOW-FAT MILK.