Did we ever got an explanation of why getting Blackwood/High Isle style materials for furnishings was made so unneccesarily frustrating?

I've seen plenty of people, for a long time, complaining about that, people (myself included) doing both chapters dailies for 3+ days in a row without getting a single one, even deconstructing the items you get with all the decon bonuses.
it jus feels so wrong, by normally playing the game you came a cross a awesome blueprint, you want to decorate your home with it and you set yourself to gather the mats. You go, to the wiki, it drops from daily rewards, you go and do your dailies and get nothing.. hm... next day, go and struggle to kill WB with little to no help, scout delves, do events, et... and... nothing. another day, another try and.... NOTHING!.
Very stubborn players probably will stick to it, eating up the frustration and hopelessness, other will just buy the mats from guild stores or the furnishing themselves from the crownstore, just to avoid the horrendous experience of getting them by playing the game, that saddly seems to be the intended way.

I just cannot wrap my head around the decision making for this, like it just ruin the entire experience of furnishing your home. Nex time you get a nice blueprint you only think on selling that curse to some other player, because you may not be willing to do dailies for weeks to craft 1 or 2 pieces at most.

Now, I know I'm not the only one who had to go through this nightmare, and I've seen plenty of complaining about this here, ingame and in reddit, so my question is: why?
If this horrendous experiences is that way by desing and is not going to change, can we at least get an explanation of why did they have to make it this way?