Title: We should be more discerning to watch the "good" on TV, and not so much the "bad." And naturally large families ought to be much more encouraged publically.
I'm not so sure that the Waltons are "too good to be true." I think when people for religious belief, or niceness, or faith, or whatever, allow for the natural flow of life, and purposely refrain from the use of any form of "birth control," that relates to them being kind and respectful to one another. Such people are more likely to see each and every human life, as sacred, special or something. Even in the "large family" movies, you can see children stick up for their siblings.
But if the Waltons be "too good to be true," did the Waltons even claim to be real? You did know that TV isn't exactly real, didn't you? I don't understand people's silly objections to "Leave it to Beaver" or "Ozzie and Harriet" or whatever, as supposedly being "too perfect" of families. Even "Andy Griffith" seems to be a strangely popular TV show. When I watch TV, do you think I want to see "real life?" Of course not. I call look out any window or my car window, any time I like, and see "real life." Boring. I want to see something of "idealized life" or something like that. That's one reason I like sci-fi. I like to get some imagined glimpse, of how great life might be in the future. I like some of that optimism. Now some people seem to go the other way. They want to see action and violence or immoral sex on TV. And I don't always like every "sweet and syrupy" TV show. But I do have some respect for certain family-friendly shows, such as "The Waltons," or maybe "Eight is Enough." There's also the curiosity factor in, how can a family be so large?, or what were large families like?