. . . my own straw poll amongst relatives and friends indicated that they were mostly not interested, one way or the other, because the issue had never affected their lives.
That doesn't surprise me, Granny23. There has been a sudden outbreak of people wanting to 'change sex' (although this is impossible) after millennia when this never happened. The fact that most of the 'transpeople' don't have medical intervention shows that this is not because science hadn't developed to the point where this became possible until recently - it is because the TRAs (trans rights activists) have pushed the agenda in such a way that men can gain access to women's spaces, compete against us in sport, skew research statistics and nullify sex-based concessions for women, and accuse anyone who pushes back against this of transphobia and discrimination.
The whole basis of their claim is that 'gender norms' - the behaviours that are deemed to be typically 'male' or 'female' - are, in fact, determined by people's biology, rather than by society. That if a child prefers playing with dumper trucks and playing football they must 'be' a boy, and if they play with Barbies they must be a girl. Anyone who likes both football and ballet can't just accept that, but has to be 'non-binary'. Who actually lives life only doing things that someone else has decided are 'male' or 'female' actions? Virtually nobody, IME, but TRAs are so obsessed with 'gender norms' that they can't accept this, and instead claim that men can 'just know' that they are women, or women men, and those who aren't extreme stereotypes must be non-binary.
Most older people won't have experience of this, unless their grandchildren have been caught up in it, or they work in a 'captured' environment, such as a university or local government, where Stonewall rules are rigidly applied.