If you're making a wheel that exactly fits the design requirements you'll have a hard time when does requirements inevitably changes. Making rigid designs instead of plyable is a terrible idea if you're working with web
I highly doubt the technical debt and inevitable vulnerabilities weigh up any perceived time saved.
Also when you use a framework like laravel you're sort of forced into building applications in similar styles making it easier for other developers to cooperate instead of having to figure out some weird homemade framework.