I think the difference in our perspectives is the type of studios we work for. In a AAA studio what you're saying makes perfect sense. But I've worked entirely for small- and mid-size studios where developers are often asked to help out with things outside their specialization. In my world, even having a specialization probably means you're more experienced and thus you're involved in a variety of projects.

Whether that's "most" software engineers in games or not I can't say. AAA studios employ way more engineers per project but there are comparatively way more small- and mid-sized developers out there. It's interesting how strong the bubbles are, even within a niche industry like games.