First, this is a tenant forum, not a landlord forum.
Not everyone is as quick on what is "obvious," and manuals are not always easy to understand.
However, you seem to think that all tenants will figure things out. I can imagine if I spoke to the tenant of whom you are complaining, I would hear a different story.
I can tell you with 40 years experience of landlords that have this same view, will often refuse to make repairs or provide required services. Some thing are YOUR responsibility.