From all the oil analysis's done on bobistheoilguy, it seems like HCF-2 isn't anything special.It DOES have specific properties (as do many Honda fluids) so it is probably worth using. Could you buy it cheaper online? E Bay in the US has several listings. Unfortunately, shipping costs might negate and savings.
Aisin CVT fluid is supposed to be compatible, too...but many 'alternate' makers say that, and you wouldn't experience issues until it was in the trans for many miles.
As long as the manufacturer's website states that it is approved as being compatible with HCF-2, I personally wouldn't worry because the data to backup the decision is out there.
Changing the fluid more often with 3rd party compatible will make the car last longer than changing it once in a while with HCF-2.
This one guy had 286,000 miles on his original 2015 Honda CVT using Castrol Transmax CVT or Redline CVT, changing it every 20-30,000 miles. His car calls for HCF-2.
If you look at his signature, he's now at 333,333 miles!!!