Sorry, but you don't sound like a very solid teammate to me.

>> you can simply work on something else while that particular task is blocked.

This attitude is a recipe for massive amounts of parallel WIP, not to mention knock-on effects and blocking dependent work. "Planning for blockers"? You're either being intentionally simplistic or not really concerned with anything beyond your own work. Enter "useless managers" like myself who need to "needlessly interrupt everybody" to try and get things coordinated...