What's the name for this fallacy?

In My Humble Opinion
1

I’m looking for a term for the fallacy when people assume that they represent an average person or a majority of people, especially related to likes or preferences. Examples include:
“Why did show X get cancelled, it was a great show” - when the show had the worst ratings on TV
"If a car company would only make an all-wheel-drive station wagon with a Diesel engine and manual transmission, they would sell millions” - when the company would struggle to sell a few thousand

This can also apply to the negative as well:
“Why is X so popular? I think it’s terrible.”

I’ve always called it the fallacy of average, but don’t know if there’s a better / more descriptive / more widely used term.

2

Hasty generalisation, I’d say - assuming your own view is representative of the majority.

3

closest I could find is mind projection.

4

Could be considered a form of anecdotal fallacy or availability fallacy.

5

I think the obvious term is “the Dinsdale effect” - no? :cool:

6

It doesn’t feel like any sort of fallacy at all, just confirmation bias (assuming that one’s atypical experience is actually typical).

7

Just when I think I’ve reached the end of the Internet, I stumble across an interesting new site; fallacyfiles.org is a new one for me.

From fallacyfiles, it seems to be a sub-fallacy of Unrepresentative Sample. Hasty Generalization seems the closest, but doesn’t seem to have the “me” focus.

8

well it is a falacy, but its simply wrong straight out, it won’t trick many people.
Falacies are the sort of thing that someone else will say “yeah that sounds correct to me !”. Falacies are really propaganda.. a false argument that sounds good to many.

Using ones own subjective assessment as the one true assessment is very like the strawman argument. The reason its not strawman is that in this case, the strawman is not fictional - he does exist, but its pontless to refer to since he is insignificant. I suppose if you are pedantic enough to give a name to the falacy, then “strawman” is not the name…

Discussing the correct way to measure something , and then actually finding one good way and agreeing to use it, is a good path toward resolving arguments, so its wise not to slam someone as a propagandarist just for trying to measure something a different way…