Sure, but at the same time, a big part of Qubes involved creating very secure jails for processes, which they could not escape. So, 'keeping untrusted stuff in its box' is sort of her expertise, and if anybody's going to do that right, it's probably her.
Chances are, the NSA won't be renting out Top Secret machines for Golem, but some rando with a multi-thousand dollar gaming rig she's just using to browse HN on may well view the tradeoff differently.