Do you live in a universe where micro-USB cables are not available, or something? There's gonna be something or other that needs micro-USB for the next decade, so just buy a few and move on. They're not expensive.
[later edit: I bet it has to do with backwards compatibility. They don't want people to need to rework case designs to use something that is meant as a drop-in replacement for the Pi Pico 1.]
I (deliberately) haven’t bought a consumer electronic device that still uses Micro USB in years so don’t accumulate those cables for free anymore like with USB-C.
Of course ubiquitous USB-C dev boards/breakout boards without 5.1kΩ resistors for C-C power is its own frustration ... But I can tolerate that having so many extra USB-A chargers and cables. Trigger boards are great because they necessarily support PD without playing the AliExpress C-C lottery.
I guess you’re not gonna be buying a Pi Pico 2, then. So why are you complaining about something you aren’t going to use?