I don't think it's simply "engineers hate open source". Most of the open source tools in the embedded space are just a bit crap. The reality is that good software needs many thousands of hours of development time. The embedded space is actually pretty small in development budget terms - so fewer engineers who might devote time - and also there's less overlap in skillset - electronic design engineers rarely have the software skills required to develop EDA software.
Most of the incredibly well used robust open source packages are sponsored by large tech companies. The embedded space just hasn't had that kind of sponsorship.
Most of the incredibly well used robust open source packages are sponsored by large tech companies. The embedded space just hasn't had that kind of sponsorship.