He said that's what he cared about, but the comment was about the "group" and the whole group probably does both.
Also, Twitter ships anti-abuse features all the time so they seem to care about it. Although they're not especially strong, like the one that asks you to reconsider if your tweet has too many swear words.
OP was pretty explicit that his job was not banning spambots, but "protecting marginalized users who face a lot of abuse".