The RP2xxx also comes with excellent documentation and libraries. If anything, with the drag-n-drop flashing it is even easier to work with than an Arduino.
From a practical end user perspective, being able to buy a device, and download and install binaries onto it to make it perform a specific purpose by plugging it in and dragging the file over, is considerably easier than installing an IDE, and downloading compiling and installing from source.
> Are they more in number and easier to use than the Arduino libraries?
It's not either/or, beyond what's in the native SDK RP2 boards also benefit from the Arduino ecosystem via the excellent and well maintained https://github.com/earlephilhower/arduino-pico
> Are they more in number and easier to use than the Arduino libraries?
I haven't done a direct comparison, but considering that the hobbyist ecosystem (which is the main source of those libs) is shifting over, it is just a matter of time.
> Why do you think the Arduino is more difficult than "drag-n-drop flashing" by comparison?
Because you need to install an IDE and mess around with things like serial drivers - and it gets a lot more complicated if you ever have to flash a bootloader. It's not hard, but it's definitely not as trivial as the RP2xxx's drag-n-drop.
