Because it was a made for TV movie that was all done on purpose. Everyone in that one was mixed up racially, and it came off as genuine and delightful. And in 1997 it hadn't been done before. It was fresh and fun. But it also wasn't supposed to be a literal retelling of the story. It was an upbeat new twist, in living color. It didn't read as cringe, it read as fun.
(Oh, I'd forgotten that Bernadette Peters was in that too! I've always thought she was fantastic!)
If Disney had already succumbed to Woke in 2015 when they faithfully retold the Cinderella story in live action, but had used a Black actress as the lead role while the rest of her European family and community had stayed white, that would have seemed cringey and dumb.