You're in a bubble. There are tons of people who have to go to work every day without having their cell phone. That's not a product of luxury. It's the opposite. And with your comment about "exclusionary of parents, caregivers, partners, and more" you've cleverly (or not) swapped for-all and there-exists implicit quantifiers—by "exclusionary of parents", you meant "exclusionary of people who are a parent to someone and won't be parting with their phone" and by "partners", you mean "people who are a partner to someone and won't be parting with their phone", etc.
With the obligatory "This post was a thought exercise..."
There are also those of us who can be on long flights, travel places without cell service, may turn off phone if international, etc. I'm mostly reachable by cell phone but, no, you're not guaranteed to reach me right now every moment of every day.
