i do think that (cis) heteronormativity makes us blind to (the possibility of) love and happiness, if they reside outside of that frame.
and so some people resign themselves to living unfulfilled lives. and unless they are complete weirdos, who cannot but stumble over everything normal*, they might live a whole life that way
once we're trapped in such a frame, any escape, or any attempt to carve out some kind of happiness is, of course, cheating, or a destruction of the family
*such as this lady: https://dynasty-scans.com/chapters/my_blue_garnet_ch01#23
(pictured: my mother and father asking me why I can't just be normal)