J3K, I don't see it so black and white. It seems to me with all those areas, there is a whole spectrum of possible levels of participation. With breastfeeding, you have exclusive breastfeeding on one end and no breastfeeding on the other... but is someone who breastfeeds and supplements with formula really a breastfeeder? What if she only breastfeeds once a day, and formula feeds the rest of the day?
With vaxing you have the spectrum between non-vax, selective vaxing and fully vaxing. In this area you wouldn't call someone who has done some or all vaxes a non-vaxer. This is one spectrum where the middle ground actually does have its own appropriate label. But selective vaxers do share some of the same concerns as non-vaxers.
With homeschooling there is a similar spectrum. As previous posters have suggested, there *is* a difference between a child attending public school and doing public school curriculum at home. Not a big one, but it is one step into the homeschooling spectrum IMO. Perhaps if the label weren't homeschooling, but child/parent-led schooling or something like that it would make sense to exclude the middle spectrum from that label, but it's not?
Maybe, like with the autism spectrum, those in the middle should just say they're on the homeschooling spectrum?
While it may be important to advocate for the ideal on the far-end of the spectrum, there does need to be support and encouragement for those in the middle, however they get labeled.