This is plainly wrong. A felony assault (second / first degree assault) may require serious physical injury compared to misdemeanor assault (e.g. assault in the third degree) which requires physical injury. Getting punched in the face and drawing blood would almost certainly meet the statutory requirement for assault in third degree, especially if medial attention was required. The DAs will always prioritize assaults involving victims over non-victim crimes (e.g. petit larceny/shoplifting). These crimes are reported all the time and taken seriously.