They tested play sand for asbestos, and four of these positive tested play sands were ordered on Temu. The play sand is for kids!
https://www.test.de/Deko-Spiel-und-Bastelsand-Asbest-Alarm-i...
Are you US-american? (Walmart is a good hint that you are.) There's some widespread misconceptions/prejudice there, e.g. the Kinder egg thing. The EU has no problem with selling those.
Not to mention, new parents are often some of the most sleep deprived. The burden should be on the manufacturer to make these safe. And it's not even that hard: just use one of the clasps on the battery compartment that requires a coin or key to open rather than just your fingernails.
The US seems burdensome because some US Entrepreneur already tried not caring and something happened. A good comparison is China cars which don't pass US standards for import. It's also a reason US Makes can't iterate as quickly as they aren't allowed to do the same things that China Makes can to iterate fast.
Whether or not it needs to stay that way is really the only question. I think most reasonably intelligent people read things like suffocation warnings and go, "well obviously don't do that." But the regs are written for the people who aren't that bright who will do it anyway.