OP yes YABU
It really comes down to what personal preference is.
I love the surprise element of a subscription box , I don't mind spending a bit of money on stuff I usually wouldn't as I view it as having saved on buying a full size of something new to try.
We used to get graze for a long time. One every 2 weeks it was much excitement from the kids and oHHH can I have x. Once it got to a point most of them were no longer excited we stopped it. It is not about you being able to just buy what you want and use that all the time. it is about being a bit adventurous and trying new things.
We have a subscription for Owlcrate, Geekbox (last week) and dd3 wants one for Luckydip so she will get that for her birthday money from my dad.
DS having just been told of this thread is now wanting
Bacon club
Socks (he has a thing about socks its a longstanding joke)
and he is very keen on the fudge one.
As a joke he also wanted the lego one. (he is 15)
Personally I liking the idea of the hygge one.. Seriously considering the pink parcel (simply because with 4 ladies in the house we often run out)
Just discovered that they do a marshmallow one that would be fun & I am seriously considering a coffee one for dh for Christmas.
the simple answer is. Some people find enjoyment in this. I think that is a good thing.