Yash's daily routine of these so called "lazy" activities may not be exactly dangerous; however, if he wants to obtain a good future, he would have to ditch most of what he's doing. Engaging in most of these is completely fine, as most of the times, one can actually learn a lot, even better themselves through seeing others' mistakes in what he engages in.
However, there's always a bad side in anything. For example, watching TV is not that harmful, but binge watching TV, especially from a close distance, is surely harmful and exhausting for his body. The same logic also applies to other stuff.
(105 words)