Why is this a problem with Disney?

Who cares? Online trolls make inappropriate videos with characters. Rule 34: If it exists, there is porn of it.

It's so exhausting that companies are overly cautious about everything and let a tiny niche of internet culture drive these decisions. If you get obscene material in your social media feeds, you will continue to see this kind of stuff except maybe with some Disney IP. If not, it will have no impact to your life.

But practical things that affect 99% of people like you mentioned will be better, like your child wants to hear Mickey wish him happy birthday. So I applaud this.