It's quite simple. There are two reasons: boobs, and legs. And before anyone gets in a tiff about that, think about the accurate criticism often made by comedians, male comedians all be it, that a man is always thinking about sex and/or is ready whenever he's asked. That is the context in which I give my reply. In fact I'll go as far as to say, it has almost nothing to do with her being a nomad at all.
If a typical guy (I say typical because this post itself was dictated off a generalization) hits it off with a woman at Lowes, first of all, his male instincts are going to go on a date with her merely because his sub-conscious was eating pizza for breakfast down in his spiritual "cellar", got a whiff of perfume, flowery shampoo, lady speed stick, whatever...and dialed the red bat-phone, covered in cobwebs, in his brain. It then proceeds to inform him "Hey, y'know we might have sex in the near future." Now, double down on that analogy: he meets a REALLY attractive woman at Lowes, they go on a date and she says "I just wanted you to know I'm a nomad" The primal vat of hormones in his loins is gong to say "It's okay, because she's hot and we might have sex later." So no harsh criticisms will be made.
That's aside from the fact that there's a possibility, maybe a slim one, that she on-the-fly asks if he wants to go on the road with her. In that case he definitely knows he's sleeping within the same proximity as her, or same bed, his odds for sex have improved, tremendously at that point. And...he doesn't have to go to work the next morning and.... gets to go on a huge road trip.
Now, critics of my logic may say "Y'know it's about connection too! They could just meet and connect!" True, and not unlikely. Also, I completely support that argument. In fact when, not if, I meet my nomad Queen (thus she will be treated like one), I don't want to be in a relationship if there's no spark. But that was not the matter being discussed in this post. The question was "Why do solo female Nomads have an EASIER TIME--?" I would at least chew around the "gristle" of my input and consider it a little.
Also, it's an ego thing. Nomads are becoming more accepted, but I know in my circles people still think you're going bonkers, or having a mid-life crisis, or see you as homeless. I once had the same attitude. I'm sure other people do too. I'm also sure, as a guy, that if a man shares the aforementioned views, he in some way feels he doesn't have to compete with her, or peacock, or anything of the like. Though nomads can work just as much as a non-nomad, the typical guy with those views sees he doesn't have to perform. His job title doesn't matter. And....drum roll....he believes he can bargain for sex more easily. In fact I'm sure some big Vegas sign is flashing on and off in his head: SEX SEX SEX.
My two cents, probably doesn't buy much, but we boys do, all be it by nature, hold an audience for our libidos.