Improving software needs a cause (testing = revealing the problem), which then hopefully leads to an effect (development = coding the problem solution). And due to the fact that without a cause there is no effect, testing improves software. Period.
Improving software needs a cause (testing = revealing the problem), which then hopefully leads to an effect (development = coding the problem solution). And due to the fact that without a cause there is no effect, testing improves software. Period.