This is by far the weirdest of all arguments ever. The OP compares faster execution of code to being a comfortable aircraft and slower to an uncomfortable train. What he missed out on is, that it's easier to build out code that may execute slow, but works(making it more comfortable - room for quick changes to the product), rather than making something that takes a hell lot longer to make(and then spend proportionately longer when you have to change something)

I'll take Ruby vs C as an example. If I was to test out a weekend project, I'd rather choose ruby, even if it's going to be slow, as I can focus on finishing everything in the few hours that I have