Is there something inherently wrong with very few people listing honors? I didn't list any on my AMCAS precisely because I didn't think any were worth listing. You're right - GPA honors are praiseworthy but it's pretty self-evident from the grades section.
Frankly, I had better things to use my 15 slots on than telling adcoms I got a 3.5+ in every semester. I've never seen a Dean's list requirement that's somehow at a higher standard than what is a competitive medical school applicant GPA anyways so really, I'd expect nearly all applicants to have Dean's list.
LizzyM also did not say that those scholarships or awards should not be listed. She actually said the exact opposite.
PBK, major scholarships, and departmental awards seem to fall in this category, no?
The bottom line is - it won't hurt but most folks probably have better things to talk about on their AMCAS.