This is a big misunderstanding about from the "openly trans" community. There are COUNTLESS trans women who dont openly present as trans and only want to pass off as a cis woman and live their life.
I can totally see a young transwoman who wants to pass off as cis let her self fall in love and get involved with someone who is treating her like the girl she always wishes she was.
The openly trans community and the "i just want to pass" community don't usually get along. The pass community just wants to be seen as a woman and doesn't understand broad casting of being trans while the openly trans community doesn't understand why the pass community wants to be cis and thinks they should be proud of being trans.
Honestly, it's weird that they are both under the trans label because they have incredibly different values.