Any routine works for a beginner—low volume, moderate volume or even high volume. But as you get stronger on lower volume, you need to add some volume to make further muscular gains given your training with enough intensity. How much volume each person needs is very individualistic. For example, I need a minimum of 16 work sets taken to or near failure on quads once a week to obtain maximum growth. Anything over 20 sets seems to be too much. Fewer than 12 sets isn’t enough. But my biceps and triceps will grow well doing only 9 sets per week. But they grow their best performing 20 intense sets per week. There’s no one size fits all when it comes to training, diet and steroids.
Most professional bodybuilders find that nothing works better than the traditional bro split were each muscle is trained once a week with moderately high volume—10-20 intense work sets done once a week. They don’t look the same each year. The added volume is how they continue to profess after their strength gains have plateaued.