Outside of modeling there are lots of traditional sports in which people want LONG TERM CONTINUTIY, so new records can be compared with the past and so people can learn the games and buy the equipment and build the venues, these include,
Boxing, tennis, running, swimming, golf, baseball, soccer, and cricket.
Now if somebody else wants to start up a league for skateboarding, hot dog skiing, jet skis, or computer games, that's just fine. But don't expect the people who are invested in the traditional sports to welcome wholesale rules changes from outsiders or wanna bees who can't win under the established rules.
The title line:
"Why is change in this sport so feared??"
...is a cheap shot and an inaccurate one. Opposition to a particular proposed change does not imply or indicate "fear". It mere indicates opposition to a particular proposed change.
If somebody wants a change that effectively creates a new event, just go ahead and create a new event. If the idea has any merit, it will attract followers.