There's some truth to the article. If it simply were a matter of unbundling and offering the same lineup it wouldn't save money--you would get fewer channels but pay more per channel for the same (or probably a bit higher) total bill.
The elephant they don't want to mention is that the current system subsidizes stuff that couldn't stand on it's own. Unbundle the cable channels and those subsidized channels will go away--and your bill will go down by the amount of the subsidy.
Unbundling, then, is the right wing option, and bundling is the left wing one.
Say 30,000,000 people want to watch a reality show about Kim Kardashian; 300,000 want to watch a film about Kim Jong Un; and 3,000 want to watch a documentary about Kimchi manufacturing, then the last group would have to pay much more per person to cover the costs of providing the program they want - and many might not be able to afford it. But with bundling, everybody pays the same price, and everybody gets to watch the programs they like.
Why are all the people who are usually in favour of this sort of approach, now against it? Normnally, the majority getting what they want and a minority being left out is the sort of thing they are against.