If someone has never been dysphoric they aren’t trans

This line of logic will always backfire on you, like this:

If someone has:

• male biology (i.e. male sex)

• male socialisation (i.e. male gender identity)

• male privilege (i.e. experiences transphobia, not misogyny)

they aren't a woman.

See what I mean?

Dysphoria is arbitrarily chosen by you as a measure of trans status (while you continually & conveniently ignore the fact & implications that dysphoria isn't unique to trans people). You could just as easily have chosen 'transphobia', like this: Debbie Hayton experiences/has experienced transphobia, therefore she is a trans-woman. Transphobia is a more universal experience of trans-women than dysphoria is.