Because our players don't cross often or well. Coutinho doesn't, Firmino doesn't, Johnson didn't, Moreno doesn't, Lallana doesn't, Sterling didn't, Markovic doesn't, Ibe doesn't. I could go on but you get the point.
James Milner crosses a bit but he's hardly David ****ing Beckham, we aren't going to build an attack around his crossing ability. And in any case bring Benteke in and we reduce the effectiveness of our best attacking player of last season and other fringe players like Markovic, Ibe etc.
And yes, in theory Benteke gives us an option in middle to cross, but in reality what will happen is we won't have anyone running in behind trying to stretch the opposition defence which will result in us crabbing the ball across the box eventually working it out wide to float a crap ball that is no use to anybody and go right into the arms of the keeper for 90 minutes. It'll work in 1 game against Watford in December where we'll score a late goal via Benteke header and we'll talk about how we've turned a corner and how we've finally started getting the right sort of delivery into him and then we'll proceed to crab the ball across the box and launch aimless crosses in for another 3 months before Benteke gets injured and we'll finish the season strongly without him. Then we'll tell everyone we've learnt our lesson and that we're better without Benteke then new season comes around and we will STILL start the season with Benteke up front and repeat EXACTLY the same mistakes again.
Its just unbelievable to me that we've had this situation with Carroll a few years ago and Lambert/Balotelli last season yet we are going to do it again this summer and waste another transfer window.