LoC is a red herring. And the fact that thousands of people decided to introduce his LoC as a dependency in their local development environment makes the point.
I'm surprised to see supposed software engineers get this wrong. We tend to dismiss look&feel type things as low effort which is funny because very few of us could make a make a good theme if we tried, yet it's "just" a matter of picking colors.
It's also funny to see a "supposed software engineer" shit on other's tools and post veiled personal attacks based on a single Internet comment. If I were you I'd probably insinuate you've never worked on any large code base so don't know LoC definitely correlates with complexity as a rough first signal (not to mention I included a rough analysis of actual code as well), but I shouldn't do that based on a single comment. Anyway I've maintained plenty of open source code bases large and small, popular (>10k stars, yes that's not a very good metric but it's also a useful first signal) or not, so I'm pretty well equipped to evaluate maintenance burden.