I don't know. I think "straight" just means "compliant". It is broader than sexuality. The opposite of straight isn't gay, but "crooked" or "bent" or "crook". People "go straight" after being reformed from a life of crime. It just means "conventional". So if someone manages to simply REFRAIN from indulging their homosexual desire, I think that is adequate to be considered "straight". Like Freud I think same sex desire is universal (but not opposite sex desire for reasons having to do with childhood sex segregation and being one's own sex, which makes to two orientations asymmetrical; e.g. one can never be weirded out by unfamiliar genitalia on the body of the same sex the way they can be on the body of the opposite sex). Straight people just sublimate their same sex desire (often by preferring the same sex in every context but sex itself). In fact, that might be a pillar for organizing conventional patriarchal society. It is designed by men for men who seem to be in love with manhood and use "woman" and "girl" as insults.

I think the major difference between gay (which is political) and trans is that gay liberation says you are just fine as you are, and trans ideology says your body is wrong and you are not compliant with gender expectations so you must have cosmetic surgery to make you look closer the other sex for the benefit of the people around you. It is a macabre sort of totalitarian, surgically imposed straightness that preserves a reactionary gender hierarchy that demands males be masculine (for militarism) and females be feminine (for motherhood and submission to males).

Gay liberation is partly responsible for the problem by insisting a gay orientation is a minority biological condition (which is very close to the trans argument) instead of fighting for the end of the demonization of same sex love for everybody. Same sex love and desire has a universal potential and the reason it is demonized is because it interferes with current ways of organizing society. It can disrupt wage rates. When women stay at home and men receive a family wage, 2 men working with no dependents can create a downward pressure on wages which tend to pay just enough for a household to reproduce itself. I don't think it coincidental that gay liberation coincides with a shift to two income households for heterosexuals, and the end of conscription in America (which means they don't require militarized boys (masculinity)).