But I am a developer!

I think what he meant is that you're not a developer of the specific modules that are "complaining" about not having those modules installed. If you ever become a maintainer or contributer to a module that uses one of these modules in their testing framework, then you probably wouldn't ignore their lack of installation. However, not testing POD coverage for modules that you're installing doesn't affect their functionality, so it's safe to ignore those tests.