In the context of gender, passing or blending refers to someone, especially a transgender If a trans person in stealth living also wishes to be sexual, effective Sex Reassignment Surgery would be required. In order to live in stealth.
When you're trans, and a trans woman in particular, you get used to people Trans women who go stealth are perceived/treated as cis women.
Going 'stealth' is a term used by transgender people who decide that the best way for them to move forward after their transition is to be stealth.
No one would say that someone fitted with artificial legs was a failure because he isn't as athletic as Andre Pretorious, but a trans woman who, after treatment.