Which approach should I take with this phone plan?

I own a Samsung Galaxy S6 that is currently undergoing repairs. During this time, I have given much more thought to smart phone plans and noticed a few things.
For one, they are expensive if you allow them to brainwash you. No joke, bills may come out to well over $100+ if you allow yourself to be easily influenced by the glamour of cellular “plans” and their “All of these awesome benefits or features for a low cost of 142.65 a month! No other company competes and we have the most nation-wide coverage ever known since the invention of the light bulb”.
Another thing is… are you ready? Two letters separated by a hyphen and another two letters, a space, and two words : Wi-Fi Hot Spots. They’re everywhere, right? So what’s the point of even having to use data unless we find ourselves in a very critical or crucial situation that absolutely requires the use of data.

I’m not even sure at this point what route to go. Keep my smart phone and modify my plan to fit my liking or buy a cheap little flip phone and call it a day. Maybe buy a phone to use for calls and keep the smart phone as a Wi-Fi toy (games, any sort of social media, etc).
What’s your opinion?
Thank you all for your responses, criticism is more than welcome and sugar coating is banned.