ITT people use the word "scripted" wrong constantly and without fail.
The majority of reality shows are not "scripted" in the normal usage of the word. Most of the people in reality shows wouldn't be able to memorize a script if you paid them (and they do pay them!), so nearly everything you see in the "slice of life" reality shows is a setup, not a script. Situations will be set up, certain people will be told how to act or fed a particular event the producers want to happen, and the rest is essentially improv.
The real "scripting," if you want to call it that, is in post-production, where the editors piece together what was shot into a well-paced and intelligible narrative throughline. This is exactly why there has been a lot of difficulty with editors demanding writing credits and/or Writer's Guild membership, as in many cases of reality programming the editors really are the "writers" of the shows.