As a drummer myself (outwith football) most of them have a loose grasp of any sort of technique or timing....literally the two main skills in drumming
I bet they couldn't do a paradiddle if their life depended on it. Pretty much the first thing you're taught.
Perhaps they think he's a donut who would rather get pished with his pals than knuckle down and try to establish himself as a Premiership standard footballer.
Just a thought likesay.