Current studies have shown Linus to be correct. Medical science refused to study his theories because they pharmaceutical companies cannot patent vitamin C. Mega doses of vitamin C are not harmful, however mega doses of vitamin A are.
An astronomer who postulates a young earth is staying within his field of expertise, as are the other scientists who view the data and follow the evidence and conclude our universe is young not old. As tuppence posted many scientist simply play follow the leader and do not question have has been defined as constant and invariable in spite of what has been observed. BTW, the scientists I am referring to are not affiliated with CRI.
As to evolution, some very qualified scientists in various disciplines view our universe as old and still can show that evolution is not a viable theory by simply following real scientific evidence in their own fields.