There are several loopholes in your credit distribution
1-If Dharampaji was no1 during Sholay and if it was all due to him then why he never managed half of that again, Same goes for Dilip kumar
PS- No disrespect to them I am just enraptured by your logic
2- look Srk became superstar due to DDLJ so how could he was the reason behind it's sucess like Bahubali made prabhas a superstar down South but will he be accredited for it.
3-Can Wanted ascribed to Salman as he was not in his peak phase then
Look I know you won't interpret what I'm saying but it's all about public approval, it's always wom.
A Superstar just escalate the business potential.
Sometimes the movie gets accepted but not the lead character, sometimes it's vice versa. Sometimes the most appreciated ones won't get credits.
So let's just don't go into that much detail, the lead character should get credit, it may not be due to his stardom but for a blockbusterous sucess you can't decode it like this.
How do you know Salman wasn't aided by mpk's sucess, I have enough proof to prove otherwise.
Is it his mistake that it was his debut movie as a lead?