You mean school teachers are teaching Swift to K-5 students? That’s about as daft as teaching Java or Python. These are not proper teaching languages.
The only thing I can imagine is that the teachers have been coopted by Apple’s allure. Everybody is so mesmerized by the Apple brand that they think Apple shits gold. Apple promotes Swift as a nice, easy-to-use language and the world gets sucked in. But I happen to know that Swift has its share of warts and inconsistencies.