Comments by terrified people intimidated by riding a bicycle on anything less than a dirt sidewalk? Go ride your bike on a sidewalk or asphalt path, Gomer.
There's a unanimity of voices saying "we need easy trails."
Were there "easy trails" where & when I started riding MTBs? Sure. They were called sidewalks, streets, asphalt paths on "greenways", rail-to-trail paths, etc. The first MTB trails area I ever rode was, compared to the Gomer easy stuff, a bit intimidating. Steeper by a long shot, with roots, ruts and rocks. Guess what, fellow human. That's our natural world.
If you want to know why Euros dominate MTB racing, look no further than their older cultures not being spoiled teenagers with high expectation of immediate gratification.
The trails are what they are. The land is what it is. The terrain is what it is. Raise yourself to the abilities required to manage them, or don't ride them. That's your choice.
There's an abundance of beginner friendly trails EVERYWHERE. If you're a total noob, you master them by humbling yourself to them, not by re-making them to remove what intimidates you or otherwise makes you feel less expert than you imagine yourself.
Trails are not there to fluff your ego.
They're there to give you a challenge while taking you on a journey.
Do you know what I did on that first MTB trails area ride?
When I encountered a section that intimidated me, I used the same approach I used when doing difficult word problems in math during elementary school: I worked at them. I didn't expect knowing or arriving at the answer without work. So if a section intimidated me, either I walked it until (at a later visit) I'd developed enough skill/confidence to tackle it, or I tried it several times until it became more manageable.
That's how you grow as a person.
You don't grow in ANY dimension if everything is done FOR you.
Riding MTBs is not for everyone. And, more importantly, MTB trails do NOT have to be dumbed down, changed holistically, revamped, or "modernized" to make it enticing to the most 'fraidy-cat, flatland-urban-area-dwelling, unathletic nimrod who can barely walk and talk at the same time.
Riding MTBs is like downhill skiing. There are risks involved, and the activity is challenging relative to, say, playing a video game, working a crossword puzzle, playing poker, or challenging your friends to a Sudoku championship.
It takes place on uneven terrain by definition.
So stop trying to re-define it.
So the whingers say, "well Chet, anyone can complain, so what's your solution?"
Good question. Here's my answer for those who find MTB trails intimidating and who, for that reason, beg for "easy trails."
Instead of making what people call "MTB trails" that resemble pavement, I have a much easier solution that requires no trail construction or modification.
Learn to ride a bike on asphalt, concrete, or flat dirt. Get familiar with balance, direction change, speed change, and overall bike handling while riding on such regular, even surfaces.
THEN, go ride some trails.