Why do people say Website Programming is easy?

Web programming is easy, you can google and find all solutions you need.
Compare that to programming huge system for some big corporation, where you cannot find ready to use solutions.
Or making some low level code for embedded systems or programming time critical procedures for real life machinery.
For eg. my friend works for some producer of automated processing lines, his code is full of physics and nonlinear algebra. Like realtime finding solutions for some crazy Laplace equations. Or timing stuff to ms based on some equation that is again non linear and on top of that depends on temperature outside. Well even search this forum for 4 wheels physics and solving all those quirks there, then tell me web programing is easier.

Troubles in web programming come from all those tiny nuisances, and huge elephant that nobody likes to mention that is security.
Industry programming on other hand is mostly new area, you need to start from developing methods and algorithms before you can even start to code.