The hatred for ESEs and LSEs (and other Caregiver types) comes from MBTI / Keirsey where ESEs are stereotyped as "Guardian providers" or basically empty-headed, dim-witted church organizers. ESE and LSE are used as code words for "people I don't like" in such communities.

Keirsey is a fucking idiot, of course. And yet somehow his ideas have gained some traction with the typology community, as well as the hilariously absurd notion that Sensing types outnumber Intuitors by three to one. If you see someone trying to use Socionics to justify their dislike of ESEs then they are either a Gamma type or need to be slapped upside the head.