So long as the rules are clear and apply to everyone, there's no reason to limit what it takes to shrink groups and improve performance, the best and most dedicated shooters will always come out on top in every discipline.
TR has evolved a lot too since its beginning and new bits of equipment keep coming, keeps things interesting. As much as people talk that FTR/FO, BR is all equipment and money race, TR isn't any cheaper to get into if you want up to date equipment... I was looking making a TR rifle for next year, I'd be 4-5K into it and that's with making my own stock and some other stuff myself... (had to put that project on hold)
I find it more fun to have to catch up than to try to hold people back, which sadly a lot of shooting disciplines seem more intent on doing, kills the fun and doesn't help bring new shooters in.
My grief with it is just that - smaller groups discourage new shooters. I started shooting prone with an Omark and surplus ammunition and had lots of fun working on improving. No need to have the newest, fanciest thing.