Earlier quoted context omitted.
> You're not entitled by law to take a hammer back if it doesn't work as you expect it to. Yes you are. If it’s not fit for the purpose you’re entitled to return it.
"Works as you expect it to" is not the same thing as "fit for purpose". The purpose of a hammer is (mostly) an objective fact. Your expectations of what the hammer can do, on the other hand, may or may not be reasonable. (Though in this case I think it's perfectly reasonable to claim that the camera is not fit for purpose if the EULA terms were not clearly disclosed before the purchase was made.)
For the purposes of that comment, I meant them to be equivalent ...under the presumption that a typical person knows what a hammer does. (I was avoiding the legalese)