_Laravel_ may be one of the fastest ways to ship an MVP, but raw PHP most assuredly is NOT.
I don't know what 99% of the internals of Rails is doing, but boy howdy I can outship you every day of the week using Rails compared to any custom setup.
Rails/Laravel == I want to make money. 100% Custom code == I want to build something intellectually gratifying.
I won't say they're never the same, but very VERY rarely is that the case.