You don't want your kids to have a smartphone? Fine. Don't buy one. Kids dont need phones, bur if you're worried about them being able to contact you, just get a dumbphone on amazon.
I don't think I like it, but there is an argument that kids without phones will be ostracized, or students will be expected to have access to phones in school, etc.
I know even in like 2012 or so some high school classes were expecting students to have phones for quick research and such. I wouldn't be surprised if that type of thing was moving into lower grades
As a parent you’re in a constant balancing act between disconnecting from your teenager while also trying to provide guard rails to aid their maturity and growth. If you lose a battle in an area, their friends (and the wider world, because remember they have a phone) are more than happy to help raise them.
It’s always a compromise. You can stand your ground hard on area and that’s another shard of their life that you don’t have influence on and won’t hear about. Every channel between you and your kids have to be balanced between guidance and enforcement.