That's part of it, but there is truly a lot to know in software development, and while people can argue it's not on the same level as doctor, lawyer, and engineer, it's definitely a harder job than most others out there.
Here's a list of the 25 most common jobs in the US according to Indeed: https://www.indeed.com/career-advice/finding-a-job/most-comm...
I will confidently say Software Developer (# 24 on the list) is a more difficult job than almost all of them.