Precisely so. #OpenSource Initiative Directors & staff should be accommodated if they have a moral/ethical objection to using non-FOSS for their work. Similar situations:
Staff/Directors of an animal rights nonprofit should not be required to eat meat at official events if they have a moral/ethical objection.
Staff/Directors of environmental nonprofit should be accommodated if they insist on using paper with 100% post-consumer content rather than unrecycled paper.