What makes it seem like it could have been avoided to you? When I hear that somebody chose not to use Diamond tables for their state tournament I automatically think one of three things: the promoters couldn't afford the cost, they didn't feel it was worth the cost even if they could afford it, or the players in that area didn't really care what tables were used (or maybe even preferred another brand like Valley), none of which are really anybody's fault or anybody doing anything wrong. Maybe there is something that you are aware of in this case that makes it a unique situation.
I'm pretty lucky with the Texas State BCAPL tournament I guess. Good league (BCAPL) with the state tournament put on by competent people (Bad Boys Billiards Productions) and using good tables (Diamond). There isn't much major to complain about really. My biggest complaint is probably that you can play for literally 12 hours straight without having time to eat (unless you eat during your match which I've never been able to do, especially not serious matches), particularly if you get on the loser's side too early, just one shotgunned match after another back to back with zero time in between, and I do mean zero. I really wish they could find a way to allow a short dinner break for teams in that position. I know, I know, don't get on the loser's side...lol.
But if for some reason they didn't use Diamond tables I wouldn't think anybody did anything wrong necessarily. Just that the group putting on the event couldn't afford to pay for them or didn't feel it was worth the cost. Certainly their right, and the players can vote with their attendance if they feel it is that big of a deal. But blaming Diamond or BCAPL wouldn't even be in the cards for me. If anybody was to blame it would be the promoters, but like I said I really just don't see how they even did anything wrong if they couldn't afford it or didn't want to afford it. Just because we want something doesn't mean we are automatically entitled to get it. There are always costs to getting what we want. IMO of course.