the problem is that its fine if your doing this on your own
its when you force that mentality on others because you don't know how todo it a different way that's wrong
e.g. If I only use Laravel why should my decision of only using a larval dictate that the next project has to be done in laravel, it might be something that can be done in 50 lines of code
But I only use laravel, there for you have to use laravel to solve the problem