The other is that WordPress sites do not operate in isolation, they work along with many third-party elements like plugins/themes and web hosting platforms. These elements and a lack of attention to security practices cause WordPress security issues that leave sites vulnerable.
The first and easiest step is to always keep your website updated to the latest version of WordPress and the latest theme/plugin versions.
One of the most effective and comprehensive ways to secure your website is to invest in a WordPress security plugin.
WordPress security is never a one-time activity, improving your understanding of WordPress and staying updated on the latest developments in the space is the only way to grow your site and your business without compromising security.