It's quite natural considering they need a striker now because some of their strikers can't back up when Benzema isn't playing or not doing well
If only to be used as a cover for Benzema, Lewandowski would not want to wear the Real Madrid uniform, because Lewandowski's standards are not as a bench warmer. Real Madrid and Barcelona have shown interest in signing Lewandowski, if Real Madrid cannot guarantee Lewandowski is in the main squad, he will choose Barcelona as his new club.