That's understandable.
What I appreciate about Apatow overall, though, is that even in his more "immature" efforts, he always tries to inject a heartwarming element, and make the film thematically resonant. It's never just dick jokes or whatever, and this movie looks to do more of the same in that regard. There seems to be a poignant, "time to grow up" angle that I can appreciate, among the cruder elements.
On that note, one of my dad's favorite movies of all time is Knocked Up. And one Christmas, years ago, we were with a ton of extended family, including my grandparents, looking for a movie to watch at home that night, and my dad suggested Knocked Up. A few of us said it probably wasn't "appropriate," but he insisted. So, in front of my grandparents and a couple of my more conservative aunts and uncles, we proceeded to watch Knocked Up, dick jokes and all. Everyone actually loved it for the most part, but my grandmother didn't laugh once. Finally, the credits rolled, and we all looked to her to see what she thought, and after a beat of silence, she very sincerely said, "That movie had such a great message." She just loved how Seth Rogen's character got his act together in the end, and we all couldn't stop laughing at that being her take away.