Your argument seems to be, "Extreme positions do not exist, so if someone argues against them, they are arguing against moderate positions."

You seem to assume that viability is the universally accepted cutoff for abortion of a pregnancy with a baby with no major health issues.

The correct way to report this position is "I support some limitations for abortion." Because this is, in fact, a limitation, even if everyone agrees that it's the correct limitation.

So, let's consider whether this view is universal, looking only at Medium authors, and looking only at the "bodily autonomy" argument for abortion rights.

Laura Halls gives a strident defense of bodily autonomy as the only relevant consideration, giving even examples of others' bodies attached to yours, and stating, "People should never engage with forced birthers on their own terms." (Elsewhere she writes, "Even if abortion is murder is entirely irrelevant to whether it should be legal.") Viability is not a factor: https://medium.com/an-injustice/bodily-autonomy-is-non-negotiable-a-defence-of-abortion-fd0d3c6e3cee

Eve Moran writes, "I believe there should be no restrictions on abortion whatsoever." You can't get clearer than that. But here's the article in case you want to read more: https://medium.com/@evemoran/we-need-abortion-rights-not-privileges-5ee017980967

Afshara writes, "There should not be any argument regarding who should decide to continue the pregnancy. No one else should be permitted to make choices especially when it comes to her body. This choice only should be made by the woman". Full text: https://medium.com/@afshara71/heres-why-the-bodily-autonomy-of-a-woman-triumphs-all-the-misogynistic-arguments-5751f9e73603

Daniel Goldman, in a comment to someone who apparently blocked him (or maybe deleted what he was responding to) writes, "Bodily autonomy is indeed paramount": https://medium.com/@dgoldman0/bodily-autonomy-is-indeed-paramount-which-is-also-why-i-oppose-government-as-a-whole-f511612dcaf7

There are more, but this is enough to give the flavor.

That is: you are flat-out wrong that there are no positions that go beyond the viability standard.