In all honesty I really don't think it matters to any medical personnel whether the woman is shaved , trimmed, waxed or natural to be honest. In my 26 years ,I have seen every sort of pubic hairstyle, shaved, waxed, lasered, natural , trimmed ( into various patterns), landing strip and even dyed. What I have noticed is that's its a personal decision as I have seen younger females that both have pubic hair or not as well as middle aged and older females.
I will say that when I worked on gynecology in the early 90's there was much more of a trend that the younger women in their late teens to 20's that were shaved while those in their 30's and 40's preferred to be trimmed while older in their 50's and above to have a more natural style. Of course you get exceptions to the above in all age groups. I did notice that the women that had professional jobs were more likely to be shaved than not.
Pubic hair does have a purpose, providing a cushion against friction that can cause skin abrasion and injury, protection from bacteria and other unwanted pathogens, and is the visible result of long-awaited adolescent hormones, certainly nothing to be ashamed of or embarrassed about.
I think personal hygiene is much more of an issue and has been mention the present of public hair or not really does not have any bearing on being cleaner and more hygienic. It all boils down to how often you wash and how to be totally honest, there is no alternative to good personal hygiene.