With Kylian Mbappe’s recent outcries over PSG’s failure to sign a striker in the summer, some have questioned why Les Parisiens sanctioned the £18m departure of Arnaud Kalimuendo to Rennes. Of course, it’s not black and white. Mbappe has bemoaned the lack of a target man, an Olivier Giroud-like forward, while the 20-year-old striker is…