UTC every where is only good for lazy developers. The benefits to having a general idea globally when the sun rises and sets, when people aren't working, when stores and restaurants are open, etc immediately is so beneficial
It's not just good for developers. Coordinating any plans across timezones always requires the timezone to be explicit, one universal timezone doesn't. It wouldn't be hard at all for people to get accustomed to the numbers associated with their local daylight cycle, and travellers can use a phone or website to lookup sunrise/sunset in any location, as is already possible.
Maybe we could even eliminate hours and minutes and just use percents and thousandths of a percent of a day (14.4 minutes and 864 ms respectively), to avoid factors of 60 or 24 or 3600 or 1440.
So basically in order to coordinate activities across time zones (rare), you give up having a common rough time system for waking, eating, shopping, etc. And as you said, users can “look up” their time relative to the normal on a website, which means that now people have time zones, just without any of the benefits.
