Owning your first name last name .com domain name is a flex for some people. It can make it easier for people to find you online, and it allows you to own your exact identity online. For people who are in a business selling their own services like domain brokers, consultants, or attorneys, having your first / last .com domain name is akin to a brand matching domain name.
I don’t own my first/last name .com, but I made sure I bought the matching domain names for my kids, and an industry colleague acquired my wife’s and gifted it when we got married.