I'm not sure if there's any cost in terms of contributing either, especially when by design git can have any branch as default, and will not hinder your experience when you use something other than master.
git is neutral/unbiased/agnostic about default branch name by design
And that is a good thing
a private library is not an ego-boosting appendages but a research tool. The library should contain as much of what you do not know as your financial means … allow you to put there. You will accumulate more knowledge and more books as you grow older, and the growing number of unread books on the shelves will look at you menacingly. Indeed, the more you know, the larger the rows of unread books. Let us call this collection of unread books an antilibrary.