While that may be a helpful attitude in some situations where their shared experiences outweigh differences (say gender discrimination in the workplace), it becomes problematic and harmful where experiences are unique - say female reproductive functioning, medical needs and so on.
This is the problem with an excessive 'PC' attitude - it inadvertently attempts to obliterate difference and nuance and ignores context. A male to female transgender person is just that - male-female transgender. Their experiences are essentially unique to themselves in many situations, and need to be addressed and understood in that context. Same with the examples given of XX/XY gonadal dysgenesis.
Attempting to force others to describe them as solely 'female' (and so on) obliterates many of the characteristic experiences that both transgender and female people identify with and narrows the debate. It actually replicates in reverse the kind of binary bigotry that political correctness evolved to tackle, which is a disservice to both and helps neither.
Sensitivity to difference is hard work and requires an open-mind, which is why people resort to simplistic labeling and (consequently) bigotry. But the solution is not to falsify reality and pretend (for example) there are no issues integrating certain immigrant groups into established societies with their own sets of cultural norms, or that women and XY transgender women are the same group of people.
Ultimately this approach back-fires, causing many people to abandon any attempt at sensitivity and (as we are increasingly seeing) vote for obnoxious people who 'say it as it is' to the detriment of all.
![:\](https://bluelight.org/xf/BL_Images/Orig_Emoji/wrygrin.gif "wry grin :\")
