Crap happens?

While it has happened, it's rare someone will go "#2" and stink up the entire room. Turn the bathroom fan on. I also don't think I've been in a hotel room where the toilet is 3' away from the bed/couch whatever (maybe on a cruise ship).
Don't get me wrong, I prefer being by myself, but if my choice is some cheap flea bag motel for $50/night or a Hampton Inn/Holiday Inn Express/Marriott/etc for $100 and I have to share the room, "Hi, roomie!"
I used to work with one guy and he's still a close friend. Oh, man, his #2s would often not only stink up the entire room, but practically the entire hotel. And if he let one rip, you could probably hear it (and smell it) out in the parking lot. He was quite proud of his nasty olfactory skills.
And yes, if it's a choice between a private room in a sleazy motel or a shared room at The Ritz, gimme a roommate.
You don't need to stink up the entire room in order to have an uncomfortable scenario. Even if there's a lingering odor in the bathroom, chances are the other person will get a whif when you come out. Even though it's a natural thing, I think you'd be hard pressed to find anyone that would be comfortable pooping with co-workers in close proximity who know exactly what you're doing. And perhaps 3 feet away was an exaggeration, but you're still in a 200 square foot hotel room. Noises and smells are inevitable.
.
Eh, I'm not poop-shy. Most people I know and work with would be comfortable knowing what's going on 10 feet away from them behind a closed door.
I shared rooms in college to avoid costs to ME. Sharing rooms as a professional doesn't benefit ME. In college, I was paying them for the privilege of being there. As a professional, I travel becaus it's required, NOT because of any desire to do it. Totally different scenario.
BTW, the current trend in dorm rooms is a 4-bedroom suite with each student having their own private bedroom & bathroom, and a shared living room & kitchenette.
What's this nonsense about each student having a private room and bath?!!!!

Why, back when I went to college, almost all the freshman guys were in the same dorm. About 60 guys to the floor, all in double rooms with a few triples, and one large shared bathroom. Privacy??? There was one open gang shower room with about 8 showerheads. And that was considered the norm. There may have been a wussie or two who had a problem with it.
I was fortunate enough to win the housing lottery for a suite in my junior and senior years. Three double bedrooms, with air conditioning, 1 1/2 baths, and a small common area.
There were several dozen single rooms scattered throughout the dorms, but none had a private bath. Maybe a dozen double rooms had a private bath, but there was some kind of criteria needed to even apply for them. I didn't qualify.
I think this is what it comes down to. Someone who is on the road 75+ nights a year I can see "requiring" their own room. Someone who spends <10 nights, it's not as big a deal.
Even 10 nights is too high for me now. If a night or two, yeah, I'll be OK with sharing. Anything more than that, even only one overnight every other month, I want my own room.