It's not high test though, its excess test from intramuscular injections into the body. Without an external source of testosterone, the endocrine system will keep the two balanced (unless someone has some sort of illness or damage to the testi).
Balanced but defined by your genes. My natural balance may be higher in estrogen and DHT for example, than someone else’s. My receptors can be more or less sensitive to some hormones. That explains why some people can feel great and some terrible with same lab results.