I think it's harder now than it used to be. When I started programming, any error message you saw would almost certainly originate from the beige box on the desk in front of you, which had only a single CPU core and often didn't really do multi-tasking. Over time, our computers, operating systems, applications and networks have become vastly more complex, with the effect that you can't easily build an intuition about which component is responsible for a failure and why.

Personally, I love debugging things. I have a very good "theory of mind" for dealing with computer failures, and figuring out why the computer isn't doing what I might naively expect it to do is a lot of fun. However, it's only fun because I've been able to stay on top of the curve as the systems I work with have become more complex. Starting from zero today sounds a lot more daunting.