Assuming it would do the stated job in addition to being a state way to your phone - it is a better solution, you ain't gonna educate you grandma easily, but if she can buy phone that protects her without having to look for it...

...of course, it won't work and even if they honestly tried it will be outpaced by scam industry. Or at worst case be state exploit that then will be exploited by other state (or just malicious actors) coz of lack of security in "security" software