The simple answer is no. It’s absolutely possible to create a website that runs great without ever writing a single line of code. In fact, that is one of the reasons why the WordPress platform thrives. Anyone can create a website without having a coding background. Now, just because you can make a website without writing any code does not mean that you should. You can optimize your website by writing code that does common plugins’ tasks. This can improve your website’s performance and can ensure your website provides a better experience to your visitors.
The code is quite simple, but its implementation in practice leads to errors in the site later. Unfortunately, the error is easier to prevent than to fix. For instance, you should install jQuery. Automatic loading through plugin and manually adding will lead to the emergence of conflict between the duplicates of one app. Because of this, the created on base of WP site will function slower. Performance will decrease and users will feel discomfort.