Building a WordPress site takes a few hours. Making it work takes days.
I've been doing this for years. Small businesses, agency work, my own projects. Every time, after picking a theme and adding the content, I arrived at the same list: an SMTP plugin, an SSL plugin, a backup plugin, something to hide the login URL, a snippet to clear the notice clutter out of the admin. Eight things, ten, sometimes fifteen.
Each installed separately. Each updated separately. Some of them paid for separately.