Of all of your examples, the one that comes closest to matching fake cakes is the fake engine noises that many vehicles play over speakers. A key difference is that most consumers are unaware that their car's engine noise may be fake, and if they find out they feel defrauded and tend to get upset.[a] The Washington Post calls fake engine noise the auto industry's "dirty little secret."[b]

In all your other examples, consumers are at least getting something of value. Cheap houses provide actual housing, at less cost. Knock-off clothes provide actual nice-looking clothing, at less cost. Rented Ferraris provide the actual enjoyment of driving a Ferrari, for less cost. Taking selfies on vacation spots provide some people with a temporary superficial pleasure from "showing off" to their friends.

What value does fake food provide when it is used only for display and no effort is made to pretend it's real?

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[a] For example, see the comments here: https://www.youtube.com/watch?v=4lQPc9VXBzk

[b] https://www.washingtonpost.com/business/economy/americas-bes...