Maybe in your experience, but certainly not mine. I've met lots of sysadmins. I've NEVER heard that stated about core utility software such as vim, bash, Perl, etc.
Where you do hear that, often, and it is reasonable, is cornerstone business software such as a CRM system. Things that need ongoing care and feeding are usually not a good candidate for Open Source when there is a political battle.
How about this: What C compiler is on your system?