Only if you think of it as a chore.
You don't *need* to find them all, although a good case could be put forward to be extra vigilant during events where they use collectibles like Halloween, and I can imagine Easter in future also.
There's a quest in your book to let you know how many there are, but there's no prize for it. If you feel like it, check the quest to see how many and have a hunt. If there's other times you don't really care, just coincidentally click some if you happen to notice them. A few of the buffs aren't too bad, and even just casually clicking as you randomly notice some of the more obvious ones will get you some buffs (none of which are all that essential to gameplay).