Why not CMS?
Since many commercial websites are made using basic versions of CMS, their internal structure is open to the wide public, making them extremely susceptible to targeted attacks (there is a large number of special bots that search for vulnerabilities in such websites and hack them).
The process of building a website using Framework is fully controlled by the developer, which makes it possible to detect and eliminate any potential security flaws, thus making the Framework significantly superior to CMS.
The functionality of CMS-based websites is limited by already existing templates. Although experienced developers can make minor changes to expand the functionality, any attempt to create a more unique website often turns out to be a major headache.
Websites built with Framework are much more customizable which makes it easier to implement specific features. Developers always have the opportunity to implement even the most creative ideas in many different ways.
By trying to create a versatile product and please everyone, CMS developers add many features, most of which are unneeded within just one project, resulting in a lot of unused code. Excess features create an unnecessary load on the server, which reduces the site's performance and loading time.
Websites built using Framework are usually much faster and can withstand a greater load compared to CMS websites. Fewer unnecessary elements and modules result in better performance. A CMS website is always inferior in performance to a well-built Framework website.
In order to slightly modify any part of the website, you need to figure out how the entire system works first. Rewriting basic CMS features will take more time than the same work originally done using Framework.
When creating a unique product, you will not be constantly dealing with code restrictions set by CMS. Therefore, Framework solutions are much more flexible, and depending on the requirements, such websites can be modified down to the smallest details, without wasting time on trying to beat the engine.