20 minutes to “read” 87 dense pages of legalese? Perhaps you meant to say “skim over.”

Perhaps they meant 200 minutes.

Or perhaps they also never read the law they are chiding others for not reading.

GDPR is not dense legalese. Start on page 33, read the first 3 chapters and then until bored, start again from page 1 until you reach 33 again, and then read from where you left off: it'll make perfect sense.