Yes but there is a great advantage to doing it that way....you uncover unexpected bugs in a step-by-step process. Whearas the CS approach of designing, can leave bugs deeply nested, only to be discovered later.....which then forces you to "rewrite-and -debug" stepwise....basically doing it twice. It's probably why Java takes so long to develope stuff compared to Perl.

Nature and evolution use the iterative try/fail/fix cycle, so maybe the "evolutionary approach to design" isn't so bad after all.