I agree with the rest, shards are just an amorphous mass of things.
I click them out of habit more than anything else. I never intentionally read them, and whenever I read them, I end up questioning why I am even picking them up to be honest.
I never found a shard I was looking for as a random and noticed (probably dropped them at some point, just did not read them).
To this end, let me recycle a post about shattering uniques into rare affix shards:
Rare affix shards have such a minuscule chance to be useful, it is delusional to believe you can ever find a useful one on the ground.