does the guy with zero day want to:

1. break into your machine?

2. break into some machine?

if (1) then i certainly agree that none of this really matters (i apologise if that wasn't clear from my previous comment).

on the other hand, if his objective is (2), and not everyone is using some of this obfuscation, then this separates you from the crowd for a little while (but my model is that as time goes on, you are inevitably exploited).

i realise after your company was exploited it might make you feel like (1) is always the case but for many (2) is the salient threat.