Well....I have seven rental homes and try very hard to weed those out with my highly sophisticated screening process.
....and that's not my experience.
Acceptable reasons to rent:
* Young couple saving to purchase a home
* old/retired couple who don't want up keep hassles and worries
* transients new to the area will rent for several years before purchasing
* transient military types....don't want the hassle of buying and selling
* couples shacking up.....don't always want to purchase.
I've had several of each from this list and all were great tenants......