Doing anything in Trainz is going to be compromise no matter how realistic or unrealistic the route builder's work is. The real world has an infinite grid while we are stuck with a 5 meter or 10 meter grid no matter how much we would like a much finer one.
Our textures are limited to what's available or what we can provide and unlike mother nature, we can't blend infinitely, and we really can't add an infinite number of textures either.
Our tracks are splines and have limits on how they bend. We can't blend, again the texturing, the ballast and track so there are really smooth transitions between rusty track and a smooth spanking new mainline.
Trees, well they vary in quality and complexity. Choosing and using what's right for the purpose helps get over the glaring differences between the old billboard and flipboard ojects versus the sometimes oversized, overly complex, overly bright, and sometimes outright ugly Speed Trees.
Even those nicely built DEM routes are a compromise as well. If you recall, I did go through the trouble of writing up a TransDEM quick guide that I sent you (without a thank you by the way in return). If you did go through the trouble of reading through the guide, and looking at Roland's tutorials, you'll see that as nice as this is, it's not perfect like everything else in this imperfect world.
As has been said, the skills of the user vary from early beginners, even very young children, to those with many years of experience. Many people make the routes for themselves and sharing comes a bit later as a second thought. Then there are of course, those that make routes strictly for others to enjoy like an artist does as he or she shares their paintings, drawings, and sculptors.
Until you prove otherwise that your route building skills are far above anything that the community can produce, including those works from professional route builders such as the guys over at Jointed Rail, I think it's best that you keep your thoughts to yourself. In the end all you are doing is insulting people who in some cases are beginners, and insulting beginners drives them away so we may never, ever, ever see a nice route that you would consider "worthy" of downloading.