That's not how it works though. Yes, there are ppl who eat pure raw meat (look on youtube). Japanese have a raw beef dish. They also eat raw fish. Steak is partially raw (rare).

There are multiple cases of restaurants that sold burgers rare on the inside and their customers all developed food poisoning because the meat wasn't handled properly. There are restaurants that are able to sell these rare burgers because they handled the meat properly and the meat was previously certified.

1. There are good, neutral and bad bacteria. Only the bad ones cause symptoms and diseases.

2. What people are trying to avoid is the risk of bad bacteria on a piece of meat. Cooking kills all bacteria.

3. Steak is too dense for bacteria to penetrate, which is why you only need to cook the surface.

4. If the amount of bacteria is low, your immune system can likely get rid of it without too much of an immune reaction (depending on the bacteria). If the bacteria count is high, you're likely going to start having symptoms.

5. Meat isn't automatically contaminated. Fresh meat usually less contaminated (unless the animal is diseased itself). Likewise, fresh piss is safer to drink than piss that you leave out for a day. Cause bacteria can grow and expand. The longer you leave out raw meat under conditions that bacteria like to grow (warm, moist), the higher the risk you're taking in terms of contamination and bacterial colonization. Why do you think we have fridges