Part of the problem here is that for most git workflows, most people
don't actually use "git push". ....in most large projects, the number
of people [who] need to use the "scm push" command is a very small
percentage of the developer population, just as very few developers
have commit privileges...

Ah, but in a distributed SCM world, things are more
democratic....While this is true, the number of people who need to be
able to publish their own branch is small....

There is one exception to this, of course, and this is a developer
who wants to get started using git for a new project which he or she
is starting and is the author/maintainer, or someone who is
interested in converting their project to git.