So when the minitest authors added this feature, they enabled the bad practices for a pragmatic need, and also did something to discourage it.
On the other hand, when the people wrote those tests, they weren't writing them that way to suit a pragmatic need. They were just making a mistake.
That's why the former doesn't suck, but the latter does suck. And the writers of those tests are not just enabling bad practices, they are directly performing the bad practices.