The importance of the Parallels isn't the number which is considerable but when he brings them up.
The fact remains that in each instance when a parallel is used, it is ALWAYS in reinforcement of a prior NaruSaku moment. The most telling being when Naruto saves Sakura from Sasuke we get a later parallel of Minato and Kushina.
This is followed by a later parallel where Minato mentions how alike Sakura is to Kushina well after Kushina said find a girl like me.
Simply put he has used the parallels to full effect to reinforce the basic narrative regarding Naruto and Sakura
Agreed. MK is the foreshadowing of NS.
Others like JT and DT are failed ones and Naruto and Sakura are supposed to surpass Jiraiya and Tsunade. Jiraiya failed to make a move and Tsunade failed to move on from her love for Dan.