I check my Bosch DW filter quarterly (when I descale with citric acid, also quarterly) and maybe once in two years do I find anything lodged in the filter.
I think the variation in people's habits stems from previous generations of DW that didn't clean very well. My family had a 1961 KA DW and I remember having to rinse (not scrub) them in order for them to come clean from the wash cycle. That was also using 1961 non-enzyme Cascade detergent. The other non-rinse option was Rinse/Hold cycle, which we used whenever we were short of a full load (as a family of four, if the DW were emptied earlier in the day, the dishes from supper did not fill the machine completely and often it wouldn't be full until breakfast the next day. My last GE DW also couldn't clean well unless Rinse/Hold was used or else everything was pre-rinsed. With Miele being over budget for many people, it took a decade of moderately priced KA and Bosch and other quality models to teach Americans that unrinsed dishes now come clean.
So when my Bosch DW arrived without Rinse/Hold (there were two BOL models, one with Quick Wash, one with R/H, I thought I'd ordered R/H but they shipped the Quick Wash version instead), I freaked at first. But once I saw how well Bosch could clean a mixed load of dishes up to three days old, I realized that Rinse/Hold was a thing of the past, and I was better off with Quick Wash for occasionally lightly soiled loads.
My best friend from high school and her husband have a TOL Bosch and still rinse everything, they are on automatic pilot from their GE potscrubber days.