Evidence
Welcome to my world. While this is not a direct quote of an actual student essay, it's of a type that English teachers often see. Call it support via assertion, or argument by modifiers (the more adjectives and adverbs you throw in, the more absolutely very clearly definitively true your argument is).
It is one of the few things that the Common Core actually gets right-- if you are going to make a case for a point, you need to provide evidence.
Evidence can take many forms, but it needs to be specific. It needs to be true.
Repetition is not evidence. Here's another archetypical essay paragraph.
Good parents need to be patient, because you need patience to be a good parent. A good parent is able to be patient. If you can't be patient, then you will not be a good parent. Every day, good parents must display patience, because if you are not patient, you cannot be a good parent.
It's hard to say exactly where students pick up the technique of un-supported ideas. Certainly we can reinforce it in school without meaning to. Tests where the student just has to mention a key idea or fact without backing it up help 0push the notion that we just want you to say the right thing. And of course our young humans come with plenty of pre-packaged ideas from home-- it must be true because it's what I learned from my folks, what do you mean I have to back it up with something.
And of course, it is tried and true in our culture that evidence is not really necessary. Yes, I can CURMUDGUCATION: Evidence: