Sorry dude, but we will need to disagree here.
When players are asked what they dreamed about growing up, they would mostly saying winning Wimbledon and becoming world number one.
Sampras placed a higher value on his six year ending number ones because it is HARDER to get six in a row of that, than win a single slam. Do you understand the fact that his aim was to never fail to get the year ending number one for six years to beat Connors? With slams, if you lose, you can always try for the next one, so the task was greater, but you are comparing SIX year ending number ones in a row here.
And Federer saying it doesn't change anything, we know what he has been saying his whole career - He would take Wimbledon each year over anything, saying that statement you made once doesn't change what his career long outlook was.
And with Muzza, he did it to become world number one first of all, why is that so hard to understand? He knew that was his chance to do it, with Djokovic losing form and defending virtually every title, as Djokovic was defending USO, Beijing, Shanghai, Paris and YEC....that was his chance to strike.
And again I will say this, OF COURSE Year ending number one is massive, but no one would want that without winning slams.