Excellent comparison made on twitter (credits given)

She indirectly saying naina Agarwal can't be trusted even after her suicide attempt so munna made her to do that..sam is loyal so chachaji didn't doubt him but naina Agarwal isn't! Basically she is mocking Naina Agarwal's Love ! 🤢

I beg to differ here. Because Chacha ji also took promise from them. What if Sameer had got irritated listening to that condition. Does that mean that Sameer cannot be trusted ...to get that promise out of him. Has he ever crossed his limits ?? So why did Chacha ji want that promise.?? Think practically...his age made it sound diplomatic...but that promise was for Sameer.

Its not just about age of the person. Its also about what they experience and witness. Chacha ji heard the entire story in one shot. He didn't witness Naina's pain was due to Sameer during the bet face , or when Sameer was away in Delhi or during the marriage track. If he had then his response to the situation would be as doubtful as Munna's. When he heard the story , he felt after every break up they got back. That's what struck him.

Where as Munna has seen and witnessed their breakups and getting back. If you see his character he is a lot matured in certain ways for his age. I would say practical. When he went to Delhi and saw Sameer with those guys , he was not happy. He reminded him of a girl waiting for him at Ahmedabad. He slapped him to bring some sense into his head. So , Chacha ji's and Munna's situation are so different.
And promise was taken by Chacha ji also . If you , remember Chacha ji's words he also took promise from both of them . So please don't say that he didn't take a promise. A promise whether written on paper or given by word is a promise. It has its significance. The written promise is handed to Munna but the promise was meant for Sameer . Same goes with promise that Chacha ji took. Sameer gave it but it was for Naina.

I feel the parallels had the same significance but brought out different considering the type of relationship that they shared with Chacha ji and Munna.