The Median Ringer True. 'Better' might not be the right word but I know what you mean. It is certainly true that in the Black Zone's upper reaches, provided you live in the right place and have the abillty, the things being rung a much more complex than they were say 20 years ago. It is far easier to get up a ladder if there are more people above you to help pull you up.
Ringing and striking gets better and better the more complicated you make things. So it is next to impossible to scale the higher reaches if your striking is not very good - you just won't get asked. Is that important in a wider context? Only in as much as generally ringers do prefer ringing to be good - I am sure of that. If you have ringers, or a band, who do not care about the striking, then more experienced ringers will be less inclined to help them, and so there is a downward spiral of the quality of ringing.
However that does lead to a conflict of putting pressure on ringers to 'perform' when that might not be what they signed up for. We get into this whole question of whether ringing is a Performing Art, just a hobby, or something in between.