It's actually been going on for about 20 years or more! And the points made are not off-topic!
The obsession with creating nominal graduates has created a serious shortage of people with real skills, particularly in practical/craft areas. To make matters worse , there has, over the past decade or so, been a 'cul' of teachers and lecturers with genuine craft skills, in favour of the more complaint 'graduates' who think it's acceptable to be 'one page ahead of the students' in the subjects they deliver.
The net result is a severely depleted skills-base!
There is no single reason why kids might not want to take over the family business...
Very often children do not want to follow their parents into businesses that have been disruptive to family life. - The catering trade for example - long nights in the takeaway and/or restaurant, days sent doing the prep work etc. When children are 'obliged' by one means of another to serve the family business, they can develop the mentality of it being a chore; sheer grind they resent and want freed from. In other cases, I've known of people who isolated their children completely from the business, sent them to private schools, lodged them with 'houseparents' and wound up producing spoilt, narcissistic, self-entitled brats who simply want to asset-strip the business.
Then there is the plain and simple fact that the best-adjusted child is likely to be an individual, and when it comes to them, there is no 'one size fits all' set of reasoning... My own daughter will, by her own volition, follow me into some aspect of pretty-much the same industry. But she will not have the technical skills necessary to do what I do. - Mind you, I don't have the technical skills necessary to do what she does!
Again... Running ANY business is down to your skillset! For instance, the roads are littered with the corpses of dead pubs, restaurants and takeaways... Why? 'Everybody' eats and drinks and thinks they could play mein host with ease! Reality is a bit different! - I only know that because I grew up with family in these trades and know what a scary-hard slog they really are!