TidBITS:

Hundreds of millions of customers use Apple products. I don’t know what the iCloud numbers are, but we are talking about a company that just sold 10 million iPhones in a weekend. Security complexity increases exponentially as fringe situations encompass millions of users. With Apple operating on that scale, the rules change.

Apple thus faces one of the most complex security challenges in society, and faces it at a scale only a handful of companies need to consider.

Users want security but few are willing to be inconvenienced by it. That puts Apple and other companies between the proverbial rock and a hard place.