I think what a lot of men in relationships with influencer women don't realise is that people are interested in their wife/girlfriend, not them. Jim Chapman and Stef Michalak are the biggest examples I can think of of this.
The appeal of the likes of Zoe and Tanya ten years ago was that they were relatively ordinary people. Of course they went on to have extraordinary lives with opportunities their viewers could only dream of, but they at least started out from backgrounds that were familiar to the many women and girls that watched them. It was refreshing to see content by real, relatable women — even as the content itself and the lifestyle it depicted became increasingly unrelatable.
Jim's audience wasn't interested in Jim's hobbies or personality. Any interest in him stemmed from the fact he was part of Tanya's life. On some level he must be aware of this and it must be difficult knowing that his peak was only made possible by his proximity to his popular wife. His audience back then was probably mainly teenage girls and is now just some of the women those girls grew into who likely follow him out of habit or a vague sense of nostalgia. Even now his audience would probably be more interested in Sarah than him, but she struggles to be relatable. Maybe because she doesn't have an ordinary job or maybe because she just doesn't stand out amongst the over abundance of pretty women interested in clothes, baking and books.
It's understandable that they're floundering around trying to find a path in life, what is irresponsible is experimenting with using their small child to try to generate enough interest in their life for them not have to come up with something better to do. There's enough discourse around for them to be aware of the downsides of family vlogging, so there's really no excuse for it.