Good rifle!
Good shot!
Good job of tracking!
A lot of deer are lost by people who don't know better, or who don't give a s***, or who are lazy. They shoot, the deer runs off, they go to where the deer was and don't see anything. They lock and load and look for another deer.
Like you said, you find some tiny drops of blood you are in business. A high lung shot will do that.
If a guy "loses" a deer, and he didn't spend 15 minutes on his hands and knees looking for that first drop of blood, he didn't really try to find it.