@Chris.
I totally agree on this.
For the same reason (they are from the desert), I had opted for a naturalistic enclosure and had never bought such as shelf liner, plastic stones, or blankets for my Taco - but absolutely don't see it as wrong doing so if somebody prefers.
I always think about: Would it benefit my dragon (or in general, the pet in case)?
From bugs from outdoors (I know which are poisonous and would be able to avoid those, I also know obvious signs of parasites), in my opinion, he would not benefit. He could get parasites which are inside those insects and not mature enough to be seen by how the insect looks and behaves. I could feed him feeder bugs that I keep (and hopefully breed in the future) full of nutrition, also being an active prey to hunt, and with less risk of getting parasites. They get parasites in the nature, too, that is true, and this limits their life span and for sure also quality of life, so I would minimize this risk as by doing so he won't benefit less. Same as of course I'm protecting him from predators, or would bring him to the vet which nature also wouldn't do for him.
From things like plants from outdoors/ a garden, I would say he would benefit (pesticide-free, fresh straight from the plant, and in a variety no supermarket can provide), so I would feed them and absolutely agree:
For my part I rinse the fowers off and never think twice about feeding it to my dragon.
(Same as I eat them, and was feeding them to other pets (birds, mice, turtles...) when I had access to flowers, herbs, greens from outdoors.)
From other things, like natural stones, natural sand, natural wood, live plants... I would say he benefits a lot, and I know under which condition impaction happens (it's not coming from natural desert sand), so I personally rather go with that then with a "plastic environment" and take the minimal risk that maybe some bacteria are left after cleaning them, for the benefit that he has tons of space to hide, dig, lick, a variety of surfaces to train his muscles, rub off his nails and pores, and eat from live plants.
Same as for me: I'm also not living in a sterile environment, and only when there is a health issue, other measures must be taken (e.g.: disinfecting and such).