You cant be a legend, if you cant be arsed about the club when you retire.
Cristiano Ronaldo is 100x more a Manchester United legend, then Zidane is a Juventus legend.
Both went to Madrid in a simular way.
But its how they behaved afterwards. The way Ronaldo speaks about Manchester, how he didnt celebrate when scoring against them and even appologised, how he'll continue to mention United in interviews in a positive way.
Zidane ? It never went past "i hope i dont get a hostile reception when returning to delle alpi" was about the most positive untill Pogba. Cause he'd love to take Pogba to Madrid aswel.