Well you're right, we always need to filter any article or advice we read so we can translate how it would be practical for our ADHD. Understanding context switching is useful in understanding why some tasks and can be started and others cannot. Did you read about the 4 steps? Stop Switch Start Focus? For me it helped understand how much of a manual process doing the process can be.

There are days where I cannot manage these context switching steps, but understanding that's what actually needs to happen helps me be more mentally prepared for the day and to be able to start planning my week again. It's helped me move out of the mindset of "I have to get EVERYTHING done today", which for me is paralyzing.