I spend a lot more time practicing on 3D targets I own that are shot from Treestands, Ground blinds, up hills, down hills, placed in the brush, in the shadows.
Bowman, all the tournaments I go to have those shots. Not a lot of tree-stand shots (liability), but practically no wide-open flat shots, other than the occasional long shot on a huge target. We don't have any broadhead shoots here, but other than that it's the best hunting practice I know of. Now and then we have a "string shoot". You have to follow a string through the woods and find the targets. You can walk forward, but not backward--you might see a spot that looks good until you get there, then have to shoot through a lot of junk--loads of fun!
I can understand your point--I probably wouldn't shoot nearly as many if they were all like the ones you described. Try to find an all-trad shoot--seems that they are usually set up as hunting shots vs. the wide-open ones you have seen. I have shot in a few "mixed" tournaments (compound and trad), and don't care for those myself. Nothing against compounds, it just a different game and the targets are set up a lot differently.
Chad