If your training goal is to destroy your hormones, bring on adrenal fatigue, and wreck your body with high volume, high-speed low-quality movements, you should find your closest "so-called HIT class" and eat a low-calorie diet.  If your goals are to build strength, increase mobility, prevent injury, improve hormone balance, build lean muscle, shift some body fat, increase energy levels, and improve your quality of life, you should start training and eating smarter than the average cortisol monkey.