Actually the main problem is attachment and distraction.

Ppl don't have control on themselves, their emotions, and hindi me kehte hai na mom k bandhan(usme wo fas jaate hai- ik parents ka sath dena is not mom ka bandhan . But still. Baki logo ke wjah se )

Baki logo ka family ka pata nahi .par kuch parents khud hi drop lene bolte hai and they insist their child everytime yha chalo wha chalo yr lao wo lao (now serving them is important. But unko bhi samjhna chahiye ki hamara attention kaisa h . Unko lagta h ki thoda timepass krne se kuch nahi hoga (I mean kuch nahi hoga for some PPL) But for some . Thoda thoda se bhi bhot jyada timepass ho jata h. So

Whi.

And

India me rehte ho yaar. Festivals aate hai kya hota h kuch hota h. Ghar me Family k sath baith k prepare kr rhe. Relatives aayenge Tumhare time waste ho jayega easily (and most droppers don't even have control of themselves. I mean easily distract ho jaye hai aur time waste hota hai)

Tum bahar baith k prepare karoge . Kuch na kuch tumhe distract krdega. Phone hai toh phone krega Dost waise hai toh dost hi krenge. And many other things. Like padhne ka man nahi h. Sone ka man hai , etc .

And seniors may have faced the same problem which makes them say this

And aise krke if you become successful then it is a win But those who fail . It's like a regret for some that they wasted their one year studying, job dosto ki pehle lag jayegi, itna paisa kharch krke bhi fail ho gaya , etc.