[SPOILERS S3] Is it a given that [character] travels through time?

Reading other's comments, it seems as though most people think that 80s Alt-Egon takes Alt-Hannah (who has just miscarried) back to his younger (50s) self. I don't think that is necessary – (both) Silja(s) grow(s) up in the post-apoc 2020s anyway. Alt-Hannah going to the 50s doesn't add anything, especially because after she ends it with Egon she has nowhere to go – unlike non-alt-Hannah who goes to see Jonas/Adam who kills her and takes Silja. Maybe Alt-Martha/Eva takes that role but Alt-Hannah doesn't have any conection to Eva where she had (at least some) connection to her son.