SEPPLES is a horrible language. It's made more horrible by the fact that a lot of substandard programmers use it, to the point where it's much much easier to generate total and utter crap with it. Quite frankly, even if the choice of C were to do *nothing* but keep the SEPPLES programmers out, that in itself would be a huge reason to use C.
There are only two things wrong with Sepples: The initial concept and the implementation.