Optics? Those who vote in favor can rely on harassment, protests, doxxing. Maybe delay is to portray deep contemplation of this “difficult decision” , “complex issue” .... yaddah, yaddah, yaddah...
Fear of harassment is plausible, but the “block” think among the RINO usual suspects is odd, when juxtaposed against Q’s assurance, and several others as well, that confirmation is secured in advance of the vote.