I don't think you really “get it”, otherwise you won't be concocting farcical arguments, or repeating the same things over and over again like a pre-programmed automaton. People should keep their preferences (many of which are codified biases and may not even be theirs but passed down to them by family and immediate environment) to themselves, instead of projecting them onto their children. Let them figure out who they are at the core of their being, let them decide what they want to be, and what they ultimately want in their years of existence instead of perpetuating the cycle of indoctrination (a socio-political control measure that creates dogmas and chasms, and fragments humanity by hard-wiring orthodox views instead of uniting it).
It is surprising, at least to me as a heterosexual person...maybe I should read the universal heterosexual manual to inform myself. A heterosexual couple shouldn't want the same for their kids because each individual is inherently distinctive with their own personality and temperament and little idiosyncrasies, and should be treated as a blank canvas...keep your grubby preferences and list-of-wants off that canvas and let them fill it out on their own if you really want to be free-thinkers.
Homo/trans-sexuality isn't analogous to a disability, and you should know that without me spelling it out for you. Whatever impediments are placed in people's path are done so by a judgmental society that wants to control them to follow the heterosexual norm like cattle. We should be pushing back against those controls so that folks can be free to express themselves, instead of comparing homo/trans-sexuality with a legitimate handicap that fundamentally limits them (which is essentially what you've suggested in an indirect way).
Again, why do you want to exercise this much constrictive control over your children, why can't you leave them be without fear of judgement through your patriarchal preferences? They don't have to carry on your traditions and be the flag-bearers of your culture just because you birthed/reared them because they're not components off an assembly line, and you shouldn't have a preference on the matter (because your hierarchy of preferences will be directly or indirectly communicated to them, even if you try to swallow the bitter pill). Instead of focusing on things that mean absolutely nothing in the grand scheme of things, raise them to be intelligent, self-aware, self-sufficient, empathetic, well-informed humans that can make sounds decisions and don't harbor the same preferences biases that you do...that is actual progress and what we should be gunning for as a species.
