Why I am not a vegan

[βαθμιαίος]

I tried, but I couldn't change it without leaving something else out, and the qualifiers like unnecessary and knowingly are too important to leave out. But thanks for your suggestion! If they ever expand the sig, I'm open to changing it for greater clarification.

to the extent necessary
Humans don't need meat. Eating meat causes unnecessary suffering of other-selves. Knowingly doing so is STS.

Does "doing so" in the final sentence refer to eating meat or causing unecessary suffering (or both)?