Are you even appropriately labeled a software developer if that is how you spend the bulk of your time? I'm not convinced you are. The 40% definitely sounds like software development, but there are plenty of jobs where development is part of a larger job that are not given the software developer label. The farm, for instance, involves writing some software as a minor part of the job. It still gets the farming title, not software development.
And can we really classify a job where you literally spend most of your time learning how to do the job a "degree required" job? Degree required to me at least implies that you need to already know how to do the job before you are hired. The BLS provides this information to indicate what is needed to get a job. Anyone can read up on how to do something while they are already on the job.
> Again, a HUGE "it depends"!
There are always outliers. We have to be observing the typical or average case for this discussion to have any meaning.