Which leads to another flaw - where on the gender spectrum do LGBT fall? They do not get included? Why?
No, this is not a flaw. This chart is for gender only, not sexual orientation or sexual attraction.
You can be anywhere on this chart and still have any sexual orientation/attraction. For instance there might be a female (6,1) who is attracted to males (heterosexual) or there might be a female (6,1) who is attracted to females (homosexual) and there is a spectrum inbetween.
To take sexual orientation into account, you would need to make the chart into a 3D or 4D chart with the spectrum of sexual orientation on the third (into out of the page) and fourth dimension. Like this chart would need to be incorporated as the third & fourth dimensions.
You are positing there is someone who is 80% hetero and 20% homo? How does that present? I (male) have sex with 80% females but 20% of the time men? That would be bi-sexual. This graph would also suggest that you can be super attracted to the opposite sex or very minutely attracted. How? There is no degree of attraction, it is binary, attracted to males - yes or no, attracted to females - yes or no.
. You are piling fallacies on top of fallacies and never fully justifying any of it. Btw Depth would be third dimension both into and out of the page, 4th dimension is time. Although introducing time would serve the purpose of further muddying the debate, which may be of use to you.
Back to gender, there are people who identify as different species, a cat for instance, is that gender or mental illness? There is a male who identifies as a female. And very specifically a 7-year old female (4th dimension). Gender or mental illness?
How about this model for gender and/or orientation et al;
Homo Sapiens are a dimorphous species; with both forms necessary for reproduction. The vast majority of the species is oriented to promote reproduction, i.e. hetero. Unfortunately, nature is not perfect and there are occasional accidents of brain chemistry, genetics, mental health, personality disorder, personal choice or other unexplained reasons where individuals do not fall into the majority. Sometimes bad people are not able to accept those who are different, but they should because almost always it is not their choice*.
*In the effort to make people feel better about not fitting into the dimorphous model, because
feelings, many new terms and terrible graphical representations have been invented.