Your parents and non-techie friends and family won’t have to use alternative stores, no one will be forcing them to.
And if Apple is so concerned about user security & privacy when it comes to alternative app stores, they should adjust their policies so that the apps most users want will see no reason not to be on the App Store.
Decades of experience helping protect my parents PCs tells me this isn’t true. As soon as the option is available, it will be exploited by bad actors. I guarantee that “app stores” will prey on my parents fears or confusion to get them to install that store as opposed to Apple’s, and I really don’t want that.
And if Apple is so concerned about user security & privacy when it comes to alternative app stores, they should adjust their policies so that the apps most users want will see no reason not to be on the App Store.