The thing is, most large companies have a QA team so this fear is not super tangible to many developers. And small startups are more focused on building stuff quickly (which they should be).
I think this is why this topic has been polarizing. Some people feel the need and some people do, depending on which role you're playing in your organization.
Nowadays interestingly, even the large companies are moving towards more testing because they can cut QA costs that way.
