To be honest, I would rather run a dungeon with a 15% drop rate for a recipe than to monotonously gather a TON of items (or spend a ton of gil buying them), and then craft a whole bunch of the same thing with a macro while half asleep and half watching YouTube.

Do people really think it takes skill to get the Master Craft books? It just takes time and patience and or gil. That's it. There is no skill involved. Some luck but no skill.
Getting the master books was easy and boring as could be. At least, this is how I personally felt about it. I have a hard time understanding how getting master craft books through repetitive gathering and crafting can be exciting.

Give us that "Oh! What is this new recipe that just dropped!?" feeling. Or, even if we know it could drop, I would much rather have that "Is it going to drop this time?" feeling than "Okay. I need 3000 blue scrips. If I craft this and it gives me 100 blue scrips each time, that means I need to craft 30 of them. Now let's see...that means x adamantite, x hallowed water, x crystals, and x something other junk. Considering the pop rate of adamantite nodes and the amount gathered per node...it will take me approximately x hours to get enough." feeling.

Could it get boring? At least giving us dungeons to run and hoping for a drop keeps us on our toes and our adrenaline flowing.