> It's really about personal privacy. Your computer is likely to be stolen and sold. If you don't want others reading your email, viewing your pictures, seeing your tax returns, etc. then you should encrypt the drive.

There is a very real security vs. availability trade-off though. Is the average person more concerned with others reading their emails, viewing their pictures, seeing their tax returns, or are they more concerned with losing access to those things themselves?

Losing access to an encrypted drive is a very real possibility (people often forget their passwords, and are used to that being recoverable), and is the data loss is probably more impactful than privacy loss for many people.