I knew this username would come in handy one day 😂 I like KUWTK and the spin offs. I watched one and loved them.
Good businesswomen sit on boards and oversee mergers and acquisitions, not tout their tits around for money. There's another word for that...
What a load of tosh. Good business people come with all types of skills (commercial, creativity, finance, people, emotional, procurement, sales etc etc), dealing with mergers is just a bizarre definition 
Their products sell out; games / apps that they produce are popular; books they write are best sellers; products they endorse sell well and their tv shows are watched worldwide. There is no doubt in my mind that they're not successful business people (in particular Kris Jenna who manages all of them).
Kendall's modelling career started from when she was 15 and I'd agree to some point that fame has likely helped, but you see in the earlier episodes how hard she worked to gain credibility away from her name.
I like watching the programmes; there isn't much concentration and I find it hilarious. Kourtney in particular I like as she has breastfed and co slept with all of her children; which in the USA is probably more 'shocking' than here (I think she fed Mason until 2yo).