.COM is the best known and most desired domain.
.COM is instantly recognized as an Internet address. This is not true of many new and relatively unproven top level domains. What does friendly.cars mean to you? Compare that to friendlycars.com.
.COM is also the prestige domain you share with google.com, amazon.com, apple.com, webmd.com, ferrari.com, nearly every leader in every field has a .COM address. If someone can afford a good .COM, they go with it.