Como, and anyone else for that matter - if you choose not to wear earplugs, that's your choice. Just be aware that even stock saws pump out 100Db, which can put a hurt on your ears in a short time. Ever have a ringing in your ears? It's a sign of damage, and it'll only get worse.
Some people won't wear em because they think they won't be able to hear something going wrong. Ask someone who wears them all the time and they'll tell you that's not the case at all.
Even a splitter motor is well into the 80+Db range, enough to cause damage over a long period. Ear damage is a function of volume x time - the longer you're exposed, the less loud it needs to be to cause damage.
I wish I knew now what I didn't know back in my indestructible youth.
You have me intrigued as to the noise level from my saw. I am susceptible to noise and will easily get a headache. Never noticed it with a chainsaw, or my strimmer, or my splitter or my power washer. Or my ATV or Motorbike. Makes me wonder which is the loudest.
I have protection for shooting, it will be a month or so before I get back into serious cutting, something to bear in mind.