There’s rarely any reason to have an admin account on MacOS. In contrast Windows defaults to an admin account although many actions will trigger UAC. The problem is that the more actions trigger UAC, the more accustomed you will be to pressing ok. Mac is not immune, with its sudo action password popup.
Opinions vary. Mine is you should never use an admin-level account as your day-to-day login. OS X may have features that protect you from yourself if you don't, but it's still poor practice and explicitly separating admin from regular users helps enforce the point of what you're doing.