The links you provide are internet pap. They quote unnamed "specialists" and former Detective Thomas who is a biased source.
None cite anyone with the Boulder Police. They cite pathology pundits who make money sensationlizing things for the media.
The ME (John Meyer) that actually examined JonBenet's body has never leaked or spoken publicly about the case that I can find.
You may be right. There have been numerous pathologists who have looked at this case, some famous and some not so famous. Some of them retained by the BPD, some not. Either way, it's up to the reader to decide which ones they want to believe. Some of us are invested in a particular conclusion and will advance that conlusion regardless of which pathologist said what, or what evidence exists for our conclusion.