If you're self-conscious about walking into work in cycling attire, keep your helmet and sunglasses on until you're in the restrooms/lockerroooms cleaning up and changing into your work attire.

There is no such thing as "riding easy staying clean" on my hilly, dusty, bug-ridden commute even in ideal weather. I'd rather have clean clothes on a clean nkfrench for my 10-hour workday. My assumption is that the Dutch aren't riding 16 miles each way through construction zones, up a few 11% climbs, getting bugsplat/roadsplat in sweaty 105F afternoon heat or sticky morning 80% humidity or in low-vis fog with traffic a few feet away. Maybe there are no flat tires in the Netherlands and their hands never get dirty doing minor repairs.

In the 1970's I lived elsewhere and had an easy commute; but my jeans and shoes took a beating by cycling in them, not to mention how uncomfortable they were for anything longer than 3 miles.

I also stash several day's worth of food at my desk - oatmeal, raisins, coffee, wheat bread, peanut butter, fresh fruit, canned soup. No fridge available, alas.

I keep shoes, belt, cardigan sweaters at my desk and have a simple mix+match work wardrobe that can be rolled to fit into a pannier without wrinkling or being too bulky.