Gmail is such an indispensable service for many people, that of all the apps a hacker could break into this is probably the one that would cause the most damage to a person’s life.
Just think about how much of your life is connected in some form or fashion to your Gmail account. Banking details, doctor’s appointments, travel records, and correspondence from friends and loved ones — all of it can make your Gmail account a tempting target for determined thieves and scammers.