This is the sort of stance Blizzard at their recent Con. "Don't you have phones?"
Are you so blind to the possibility that a large chunk of gamers like the concept of making a safe haven, emerging from it, to challenge the zombies on the surface, then returning to their enclave to rest where it's safe? Is that really so hard to understand instead of making a very arrogant and dismissive remark such as "disable zombies".
This issue isn't a wrong or right. But, it is what it is, if the devs themselves come out right and say it in such a manner.