Anecdotally I find extroverts prefer the office and introverts prefer home. I find that seamless access to people can be really distracting especially when I'm doing focus work.
I think you're correct if people are given a good work environment, are in on the same days and are all in the same office this makes sense. The reality is that in many large organizations this isn't the case.
There's a difference between mixed messages and incompatible desires.
My 8 yo wants to go on the roller-coaster and to eat a giant tipple-scoop ice-cream at the same time. I am stuck explaining why this isn't going to work out well, but she's insistent that both things can happen together.
A mature mind is able to join-up the dots and see the need to prioritise or prune. Modern corporations are not like that. They're a collection of colonial homologous zooids (departments) like Physalia-Physalis (Portuguese man o' war) that from the outside give the appearance of cohesion because they have a PR department, a logo, a company number and so on.
That's why it's meaningless when we read "Google says..." or "Facebook thinks..", because a bunch of sub-organisms that happen to occupy the same offices do not constitute an "entity". When dealing with them, like a patient with DID, you need to know which bit you're talking to.
What you call "mixed messages" is what I call "incompetent management" that has no clear idea what it wants.