The "Human Wave" tactic is a complete myth, yes, COMPLETE. The closest and most accurate synonym should be large-scale organized/tactical offensive. If you read any books written about the Korean War or analyzed Chinese communist military tactics and history you would realize that nothing in the form of "waves" of chinese charging in unorganized fashion like brain-washed monkeys ever occurred.
A few obvious and logical evidence to disprove this myth are as follows:
if "human wave" tactics as perceived by stereotype were in fact used. The casualty rate would be millions and millions. In WW2 Stalingrad, it is recorded that the Soviet Union did in fact use "human wave" tactics, therefore the casualty rate for that single battle area alone numbered in the millions. Western and Chinese sources place Chinese casualty rates in Korea at 700,000 maximum and 300-500,000 minimum, and this is for an entire war.
the communist leaders and commanders defeated the Japanese, the KMT, and US to some extent with only minimal equipment and manpower in many cases. The "human wave" tactic was never a very feasible strategy. Read Mao's guerilla tactics writings and you'll clearly see the doctrines elaborating on how to conduct warfare in disadvantaged postions, "human wave" tactics are nowhere in any of those books.
so in conclusion: organized large-scale attacks that often resulted in huge casualties (according to western standards), yes. Brainless waves of chinese charging with sticks and stones. No.