Commentary is not very important..hahahaha.. 99.9% of so called 'professional' commentators are under the impression they do a good job because they tend to hold down a job for an eon, the art has pretty much died a death, even with modern technology integrating into sport commentators fail, time & time again, both on radio & on TV. Some are so lacking in essential areas of communication we end up with dross, some just end up not giving a flying one about the job and some are just not able to grasp what is going on either quick enough or don't have the technical know-how to convey what is happening properly. That's actually a pretty sad indicment tbh...
The art of good commentating (& there are relatively very very few top notch sports commentators anywhere in the English speaking world and none within UK RL circles at this moment in time...) is describing the events in a way that flows, grasps the essence of it, that is not only balanced but informs with knowledgeable understanding the sometimes obvious (As this carries the listener/viewer from one part of the game to another) and the intricate nouances of the activity itself.
It needs to be the right balance of enough about the action without distracting the discerning viewer/fan whilst interjecting with essentiali/informative factoids at appropriate times (Something French could never do in a month of Sundays) and be able to know when to directly communicate/interact with co-commentators/summerisers at critical points (Woods is actually pretty good at this for the most part)
It has to be a complete symbiosis of commentator and event so you actually really don't notice the commentator, they ARE a part of the action as you would be seeing it.
COMMENTATING IS THE WHOLE ACT, if you think that commentating is purely describing the physical act of say X player passing to Y player or A player tackling B player and IS NOT VERY IMPORTANT then you have ZERO grasp of what commentating actually means..
