The ToS that comes with the software is simply a template that you can enable if you choose. You are free to (and indeed, encouraged to) adapt it to suit your particular circumstances, or to reject it entirely and set your own terms. Please don’t feel limited by what is in the default version.
The default ToS were forked and adapted from those at App.Net – see PR #5104.
Oh, and that PR was in response to the discussion titled ‘Add ToS and PP documents for podmins to use’ that you’ve cited.