How much time per week would you find acceptable to spend on these activities? I refuse to believe that number is "0 hours", that would be an inhuman (without an 'e') expectation.
Time to decompress is super important, and frankly, it is the very essence of living. It is not at all a waste of time - it's their time anyways, who are you to judge? To anyone reading this: The attitude displayed above is toxic and actively harmful. Please ignore what they've said; you can be successful AND drink with friends or get high, even a lot.
Balance is important, but you are not obliged to work on self-improvement at all times (or at ANY TIME - full stop). This insinuation smacks of victim blaming and a superiority complex. The concept that you're 'wasting time' by spending it enjoying yourself is absolutely absurd, insidious, offensive, and IMO just plain mean.