i think that "it is proportional to the character and the belief of every single fighter.." some like it ,some not...

in amateur section ,it is a must ...in non-amateur (i cannot say profi since most of the fighters are not surviving themselves only with the money from the fights) it seems that it depends on the character so that they like it or not...the proof is that some not doing it, some a little (just showing some characters) and some in exchagerated long appereance...for a person who do not like any ceronomies ,it is a torture ,sure ...from this point of view ,i believe that people would not be forced to do it...
however, it is a good concentration and stretching /preparation concept...but, in order to understand it , fighter has to understand very well what it is ...and for most of westener people it will be always a hard concept to go deep in it,even they have thai trainers ...