Isn't that the point? They attempted to save time and money by not designing a new aircraft (as they originally planned) and found a way to mount the new larger engines that necessitated the MCAS system. In addition, the solution they sold did not, by design, utilize both AoA sensors and did not advise pilots if the sensor disagree unless an additional package was purchased. Furthermore, all of this was in effort to sell an aircraft that would not need significant pilot re-training, resulting in pilots not being familiar enough with the failure mode that resulted in many deaths.