No, it all comes down to rules and regulations prescibed in the laws governing the VISA issuance, by the laws of VISA issuing country. After all when it comes to the judgement on if any individual sould be allowed a VISA or not, the consel will not make judgement based not necessarily on "WHAT IT IS " but on "WHAT IT APPERS TO BE" based upon the available evidence she/he has. She/he does not have any obligation to go deep into the matter. By the way , wont the consel believe that there are alternative places to go to get the equally great or almost equally great treatment of the same or similar kind in countries that are nearer and cost effective in the long run ? Won't the consel ask herself if the family can sustain the unpredicatable or high cost of treatment and living expenses in the long run or for unpredictable amount of time ?