You're correct that non-software companies will simply outsource but not quite correct that it must be closed source - software is simply something they don't have much expertise in and never will. The problems only show up when software becomes such an integral part of business operations that you really do need to actually do well at software or risk a lot of business. The reason that it tends to be closed source companies is that most of the relationships that the non-software companies have is when open source was really not very viable of a foundation for one's software.
Demanding and exercising the use of a throat to choke is a massive, massive part of how at least American business works due to prevailing leadership styles as well. It also shows how they tend to view their workers as well. "Blameless culture" is something that is a tiny, tiny minority that only seems to have worked out well among socialist-ish boutique software companies and until we start seeing companies that practice traditional Taylorist and authoritarian leader worship cultures fail very disproportionately, nothing will fundamentally change.
Demanding and exercising the use of a throat to choke is a massive, massive part of how at least American business works due to prevailing leadership styles as well. It also shows how they tend to view their workers as well. "Blameless culture" is something that is a tiny, tiny minority that only seems to have worked out well among socialist-ish boutique software companies and until we start seeing companies that practice traditional Taylorist and authoritarian leader worship cultures fail very disproportionately, nothing will fundamentally change.