I just think that most 'all-ages' comics are shit, and are more likely to turn kids off comics than make them readers for life.
I think all-ages humor strip books are a classic part of the genre and many of the parents here seem to have kids who really enjoy them.
Where I do agree with you more is with the all-ages books that are basically like dumbed-down versions of already-dumbed down superhero comics.
One thing I fail to comprehend is folks who claim they have no earthly idea where to get their kids comics or where to start, when one can walk into pretty much any library and ask someone those very same questions for free, not to mention the chain bookstores or actual comic shops, or online resources. It just sounds like laziness to me, plain and simple, when the gov't subsidizes libraries full of overpaid but in most cases helpful staff who are there to make those sort of recommendations and it won't cost you anything.
Or--radical idea, I know--take your kids to the library and let them look through the all ages graphic lit and make their own damn choices where to start! It worked for decades!