There are episodes where it feels like the entire point is to get the adults in the room misty-eyed and sniffling, and it all relies on contexts that younger children just absolutely wouldn't have - but they'd still have a good time! And while Bluey and Bingo (the kids on the show) frequently learn lessons, as you'd expect from educational children's media, those lessons are almost always coupled with examples from Bandit and Chilli (the parents) on how to constructively _teach_ those lessons.
(Not to mention, a bunch of episodes are just straight-up the parents learning lessons, while the kids are just being kids and having fun.)
For me, it fills the niche that Bob's Burgers used to fill - an example of a family that's quirky but genuinely loves one another, and communicates (both their love and in general) to move past situations that could become much more serious without it. (Bob's Burgers has fallen off -- to me -- because the characters feel a lot more like caricatures of their earlier selves and most modern episodes seem to rely on one or more characters carrying the "idiot ball" to make anything happen, but that's a rant for another time.)
My wife and I watch an episode every night after dinner to relax after stressful days (two episodes on the really stressful ones) and it's just... Its' very good. We always feel better by the time the credits roll. We've watched a few episodes with kids and they have a good time, but we've also watched a few episodes with other adults, and it's catharsis. It's on another level entirely. I can't imagine what it's going to be like for kids who grew up watching Bluey, to rewatch it as an adult and catch the entire other level it works on. I'm jealous. <3