As a casual, I'm gonna say you are wrong.
You guys are underestimating the impact of the world cup. Do you think casuals like me would know who Maradona was if it wasn't for the world cup? I never saw Maradona play in my life. Still knew who he was when I was a kid. Didn't even know which club he played for. It's the same for Zidane pretty much. But there's also the fact Zidane was one of the galacticos for RM, which was probably even bigger than Man Utd at that time.
People outside of Man Utd fans rarely talk about Giggs, while both Man Utd and non-Utd fans talk about Zidane. I'm amazed there's even an argument here. Especially after his headbutt, everyone knows Zidane. Even during the global television boom, it was more about Beckham than Giggs when it came to Man Utd. You can try to argue all day long, won't change anything.
*Now I'm gonna camouflage my post to appear to be on topic.* I think we can get Pogba, my guess is Real aren't that fussed, because they can wait a few years when he enters his prime years and get him then?