Extreme is always relative to the recent medians in the current nation. Usually just like the last three overlapping generations that make up the majority of the voting base, so Gen X, Millenial and recently Z.

Its extreme to not murder babies in a lot of places historically speaking, but I still think abortion at the level it is would be considered quite extreme to the Left to most people here. Same with not being taxed for all of your income constantly being a pretty extreme position if we call it relative to all of history.

In this case, letting women vote was extreme at the time. But it became normalized enough that people didn't think anything of it beyond simply being the state of things. For people to know want to remove it entirely and discuss it casually is a growing extreme position.