Engine Regeneration Info That is News To Me

I came across a JD video called: "Regeneration, it's a good thing".

Here's the main point of the video: "Lower engine loads with high rpm's cause soot build-up leading to regeneration".

So for example if you are just moving dirt, mulch, or just driving down your field or driveway, you should not be operating at high rpm's (or WOT), per this video.
I re-read my 2032R manual (2nd gen) pages 230-2 to 230-6 and it makes no mention of this. Maybe you guys knew this but as a 1st time MCUT owner I was of the belief that the higher your rpm's, the cleaner your exhaust filter would be, regardless of engine load. Apparently not.
Learned something new today.