I would instead say that PCs are boring because - unless you specifically install development software - they can only do what other people have set them up to do. This is triply true if the PC happens to be running Windows.
The old 8-bit micros were the polar opposite. Unless you went out of your way to obtain pre-made software, they could only do what you told them to do. You therefore got a much more visceral thrill when you achieved something with them.
I would say that's true in the same way that a prodution line car is boring against a kit car where there's the excitement of getting it to work yourself.
You're absolutely right; if development software isn't installed you cannot do much though I'm not sure why this is "triply true" for Windows.
Microsoft have provided free development and programming software from GWBASIC, through QBasic trhough to .Net Express editions. There is plenty of free programming software and little to stop people programming on PC's if they wanted to. There was a huge amount of dubious quality applications which emerged after Microsoft launched VB3 so it's not like people stopped programming.
Perhaps programming was more fad of its times, like the flood of garish 72-point font web page with a 'this is my kat tiddles' picture against a flashing yellow and pink background when 'the web' became mainstream. People simply evolved, found the tools they want, and moved on with what they want to do rather than having to build it all for themselves; most people are happy they can buy a car, not have to build it from a kit, can use Wordpress et al rather than have to write their own blogging and forum software.
There are always those who want something different, want to do it themselves, but there has been little holding them back from that. I would guess people, like me, have been knocking-out code on whatever platform they choose for years for their own and others' enjoyment. It's not that PC's are boring, but more that people are; in the sense they have no inclination to program or to learn how to or perhaps there is not enough help for those who wish to but cannot.
Programming as a hobby, for fun, entertainment and self-reward, is what's really diminished, much like other hobbies of metalworking, woodworking, ham radio and the like. I hope the R-Pi kick starts the hobby again, even leads to future education and careers in computing, but I don't think it's fair to say PC's have held back those who have wanted that.