First, tell Mr. Judgemental that he can find another ride home. The crap you are getting is as bad as people who say "Girls cannot play the trombone!" or "Guys that play the flute are all girly!". I have taught flute for many years, and have had linemen from the football team study with me - only missed a lesson when they took a defensive hit on the line, and got mild concussions. You like what you like. genre, gender, decade, etc.
Any of those GUYS that do not like female singers, must have had their eyes glued to Chiara on the Motown special on PBS last night. Yes, the highly sexual dance number would probably transfix them - and there were just as many women who melted over Neo's sly and smooth routine. In this case, the visuals were there to support the vocals - but the singing itself was tops in its genre. You I reset h my head an ears when I go to the opera, or a choral concert? Sure - we all do (or should!) But as Duke Ellington often said "If it SOUNDS good - it IS good."