I don't know how the survey was worded. But if they asked me, would have said "somewhat interested", in that I want to work from home 1-2 days a week, but no way all 5 days a week
It sounds like you are not at all interested in working remotely full time
What other option is this person supposed to pick then? Saying "not at all interested" skews the results of the survey to mean that this person is not interested in remote work whatsoever.
Imo in the absence of "strongly interested in working remote part-time" answer, picking "somewhat interested in working remote full-time" is the most rational choice.