Kosta If you can read documentation, you can fetch the information from both sides, feed it to AI and build your integration in a day. However, this is not something sustainable.
The same is for quick development. You will lack scalability, testing from different angles, security patches.
I am by no means an expert, but for the last 5 years I have been in system administration in the hosting industry, I have not met a company, that does not rely on it's inhouse developers to fork/workaround modules garden plugins.
That being said, I do hope for better integration, as WHMCS is my preffered tool for now and have done my upvotes. Just sharing my thoughts.