The lack of good tooling for SVN is because git is so utterly inadequate at doing it's job. So this created a need for a ton of tools that pave over those flaws and now the resulting ecosystem is a money making machine.
You're saying git is so bad that an ecosystem sprung up to support it? But if it's so bad why would it have a large enough userbase to support that ecosystem? That logic seems backwards.
The initial users came because of an enormous hype fueled by "Linus made a VCS" and a weird quasi-religious belief in the community that it is better than anything else in that space. Crazy times back then, really.
