Every domain has a technical contact, it's part of the WHOIS schema. A non-technical website owner hires someone to handle technicalities, just as a non-mechanical car owner hires someone to handle their cars mechanics.

Sure, if you don't pay attention to the care of your domain, it can break in incomprehensible ways, just as if you don't pay attention to the care of your car, it can break in incomprehensible ways.