I think you're both confusing people that simply have hormonal imbalances and those that have gender dysphoria. Hormonal imbalances can exist without GD and can be treated with just hormonal supplements. For example a guy with low T feels that he is male but shows/feels symptoms of low T, then has the tests, has the imbalance confirmed then takes supplements and feels better.
For someone who has GD they can have both low and normal hormone levels but their hormone levels don't determine their gender identity per se. And like it's been stated giving someone with GD more of the same hormone won't "fix" their GD but will only exacerbate the problem.