You have misunderstood my comment.
I’m not talking about redesigning an application without touching the html. That never happens.
I’m talking about updating a font size in a type scale, which an entire application utilises.
It’s fine to just bump up the font size on one instance of a <Text> component, as long as the new font size is part of your global type scale.
There should be no random values anywhere. Everything should be part of a global scale.