With some people, yes. Some of the ways people feed their kids are horribly unhealthy. Some of the worst are those who want to give their kids "healthy" vegetarian or vegan diets, which can permanently impair brain development.
Don’t know about the folks you hang with, but without exception, those people I know that go to the trouble of making their own dog and/or baby food have done more than ample research into the nutritional needs of their 2 or 4 legged consumer.
I doubt those that line up in the drive through lanes of fast food restaurants have done the same due diligence. But that is only my assumption.