I have traveled to many areas of the world and risked the dangers of infection, but I do like to know the risks in advance and take precautions as much as feasible. My husband takes a medication that can weaken his immune system and so this is very important to us and perhaps to others as well.
I do feel that young women and couples of child-bearing age should keep the Zika risks and precautions in mind when planning to travel. The risks are small, but the possible consequences are terrible - having a baby with a micro brain, how terrible.
The CDC will always go for the worst-case scenario because what would happen if they said "aw, don't worry about it, the chances are small!" but then some American travelers got very sick or died. There would be a public outcry so of course they err on the side of caution.
I don't jump to embrace every recommendation that CDC makes, but I do try find out about the risks and precautions and make our best decisions. I am always amazed when I hear someone say "we're going to Roatan and plan to take our chances with Malaria!" because that is just not very smart. Malaria is a terrible disease and prevention isn't difficult. The strain that they have in Honduras is not resistant to anti-infective agents, so you are unlikely to have any side-affects from the preventative drug. So why not take the medicine and play it safe? And of course do your best to prevent mosquito bites.
No place on earth is risk free, the mosquitos in my back yard could be carrying West Nile Virus right now, and our house and yard back up on a forest district with deer and lyme ticks, so that is also a possibility. Don't spend your life in a cocoon and be afraid to go outside, but just try to be smart about it. That's my opinion anyway.