Desk height only an inch or two above lap. Is that normal?

So, i have been told that arm rest height should be so your arms rest comfortably at a 90 degree angle beside you, and that the deal should be level to your arm rests.

I do this, and the set up works for me, but I feel like those around me when I go into the office 2 days a week have their desks much higher lol. Like, when I am in the office (I have a standing desk at home too), I have to move my keys out of the way in my pocket so that the desk isn't pushing them into me. Is that crazy?