I have come to understand more and more why parents are reluctant to speak out in the media. And speaking out wouldn't accomplish anything anyway. I can only remember one case ever where the pleas of a parent got their child returned home alive. I believe that case was in Canada iirc. Most children who go missing wind up being murdered in less than 3 hours after they have been missing. Everyone knew Noah was missing and LE had to turn away some because so many offered to search. So the parents knew everyone was looking for Noah.
Even Jessica Ridgeways mother did not speak to the press until five days later. She was a very shy woman imo and it was hard for the camera to be in her face and have to talk about her beautiful murdered daughter knowing the whole country was listening. And even then after speaking out that one time she was accused of having crocodile tears. In fact I don't know of one case where the parents were supported by the internet masses. Not one. And in those cases people wanted the parent or parents to speak out only because they were convinced they were already guilty of harming their child. And after they did finally speak then they were more convinced than ever they were guilty as sin even though in the end many of them were not. The majority of internet commenters seem to find fault with everything they did from 'they looked guilty' 'they showed no emotion' 'they looked down while talking' 'they cried fake tears' 'they didn't cry enough' 'they were hiding something', etc. If these parents had spoken out they wouldn't have been spared either nor believed. IMO
So I think there will be less and less parents willing to speak with the press in the future. Not because of the press but because of the non-stop 24/7 social media sites that makes thousands of negative comments about them....starting immediately and never letting up. That is why FB is known to be filled with hate filled trolls. Thank goodness here there is respect and dignity and rules to follow. When there are no rules in play the worst imaginable things are said without accountability.
And what is sad is it is people who don't even know the parents personally whatsoever that seem the most judgmental imo. Usually the people that know the parents very well and live in the same town are very supportive and they do it by actions rather than comments.
Mark Lunsford told Nancy Grace one time that losing his daughter was the most hurtful thing he had to endure but the second most hurtful thing was reading what people were saying about him and his parents on the internet who didn't even know any of them.
I remember how Marlene Lamar was torn to shreds by the internet naysayers when she continued to speak out about her daughter. The accusations were horrible and absolutely not true. She was even accused as being in cahoots with her boyfriend of harming Sierra.

Its very sad to see things like this happen over and over again when so many parents needed total support when they were in this situation.
People are individuals. I can understand if the parents are too emotional to speak or are timid and scared that their words will be twisted into meaning something they didn't say. Not everyone is cutout to talk in front of the media.
Not talking with the press doesn't show me that either of them are guilty.