You won't spend 30 minutes scrolling through your navigation app, or your music app, or through the pictures you made, or looking at the weather forecast, or...
These are all very useful features. I wouldn't throw out the baby with the bathwater.
It's meant to be a temporary setting, like to turn on while in a meeting or while sleeping, but I have it set to run 24 hours a day, only allowing people in my "favorites" to call me, everyone in my contacts list to message me, and only allowing notifications from a couple apps.
I just set it up a week ago, and I absolutely love how little I'm bothered by my phone now, including no more calls from bots, which I was receiving around 4-6 times a day.
* I assume most recent Samsung equivalents have this feature as well. My S6 had it.
When I'm testing new smartphones in stores, I'm shocked at how crappy the experience is compared to the LineageOS, both in terms of UI, and in terms of interruptions and notifications and ads shoved down the user's throat
Could you share your experience about bot phone calls? What in it for them?
Just like email spam, I assume there's enough benefit to be worth the cost, which is far less than it used to be now that, much like the transition from physical mail to email, a computer can do the calling for very little cost or effort.
I used to get a a few random spam calls from people a week, and still do from time to time. They're generally trying to sell me something; trying to ask for my vote; trying to convince me that I'm in trouble for one thing or another and I should give them some personal information or money to get out of it.
As for being called by bots, if I answer and I don't hear a human voice within a second or two, then I assume a computer just dialed me. It might play me a recording; It might connect me with a human. Regardless, it was a bot that called me to begin with, and I've no interest in speaking with or waiting for the unsolicited demands of computer programs.
I used to be able to keep a list of numbers to block with whatever dialer app I was using, but it's gotten incredibly easy for these spammers to spoof numbers. The big trend in the past couple months seems to be to use numbers that have the first six or seven numbers of my full ten-digit phone number. So if my number was 444-555-6666, I'll get random calls throughout the day from 444-555-6777. It's obvious when I see the number - especially since my number is from a city I haven't lived in since 2012 - but harder to block via standard phone apps.
This is why the white-listing of a "Do Not Disturb" mode better suits me.
As for why I get so many spam calls, it's hard to say. I've had this number for almost 20 years. I'm sure it's been sold and resold for pennies hundreds of times. I'm sure it's also on plenty of database dumps from various hacks as well. No matter, switching numbers seems to be more hassle than it's worth. I assume whatever new number I get would be just as bad.
What I _really_ want is for phone numbers to become obsolete. Just a random UUID that means "Call / Text / Message enobrev" in someone else's device, where I can maintain a whitelist of who can connect to my devices to talk / chat / etc.