I think some of your are mis-interpreting the original poster. I don't think he is upset that roadies (or anyone else) use the road. He's just curious, because his MUP is so good & useful.

I took our local MUP 3 times today. Two separate shopping trips. Our MUP goes parallel to power lines, like a nice big field. There's more to see. Families having barbecues, kids playing soccer, one family was having a huge picnic and playing softball across the MUP. I didn't even mind slowing down. My other option was a busy 5 lane road with no shoulder and an intermittent sidewalk with no ramps. No scenery either. I guess it all depends on the MUP and how serious you are to make time.

On the way home after the last shopping trip, I took backroads instead of the MUP. (thinking about this thread.) One beautiful thing about 4-way stops around here is that everyone expects cyclists to sail through the stop signs. So I did, and gave everyone a wave and a smile who let me do so.

Yesterday, when I was on the MUP, I saw a pair of ducks wading in a puddle in a low part of the field. Male & female. Today, I saw only the male, and further up the MUP, the female's disembodied head & neck off to the side. I'm pretty sure a coyote found them during the night and made a meal of the missus. Kind of sad, but coyotes have to eat too. Roadies probably don't see that kind of thing too often.