There's an old narrative tension in the trans community between late-transitioning former "eggs" and trans kids and others who "always knew."
It's mostly harmless and most agree trans people should be supported and access care as early as possible (or desired).
But there has been a tug-of-war over whose narrative is the most representative.
"Always knew" has been treated as something of a cliche created for cis people's benefit, along with metaphors often used by people who "always knew."