it's an interesting article. i believe it is actually REBT (rational emotive behavior therapy) developed by albert ellis who is considered the grandfather of CBT. i bought a book that i thought was on emotions and it is all this ABC stuff. at first it is a bit overwhelming to understand but actually makes a bit of sense. admittedly, i didn't read too much of the book as it is such a reductive approach.

the author of the article seems to be saying that it is better to go deeper & broader than just a single belief concerning a present problem and look at the past events that created this belief and all the concomitant emotions, patterns, etc that also contributed. i think he probably thinks just trying to change the activating event or consequences or even the belief itself without looking at its origins and dealing with the original event is not that helpful.

i think something like these ABCs are good at giving some handles to deal with a present problem but more helpful if combined with the deeper work. there are reasons why people believe their irrational beliefs and i think getting to the root of those reasons is necessary for some to actually change the belief rather than just saying it's wrong so believe this other thing instead. using the ABCs can be a great starting place though to get to the root.