I don’t see your point. Yes, there is no reason to do something that isn’t in your mesorah. But why shouldn’t a person decide to accept on himself something extra? If there is meaning behind a minhag (which there probably is), and it isn’t just meaningless hocus pocus, then why shouldn’t a person want to add to his minhagim?
Yekkes traditionally have not done Kapparos. Yekkes do not go to Mikvah daily or weekly (some go Erev Yom Tov, some only Erev Yom Kippur). Isn’t it too strong to say that a yekke shouldn’t go to Mikvah on every Friday?