why dont our parantes understand us?

Yeah, it sucks, I completely understand T^T
I'm not good with सलाह so all I can say is to just straight out and tell them. That's what I do, no matter how many times they try to shoo me away या say "No, daughter, I'm busy!"
If they say I'm being rude या whatever I explain to them that they need to listen to me for once, just as I listen to them *shrugs* Again, sry, I'm not good with सलाह O_<
(nice picture btw!)