Any software developer could have built what I did, and had the company realized what they were missing I'm sure they would have got one of their "real" developers to spend a couple of weeks and probably put something together better than what my intern-self was capable of
Unless you have personal knowledge that that actually happened, I will bet you dinner that it did not. Yes, it is absolutely the case that it would have been in their best interest to do it. No, software companies cannot routinely self-motivate to actually do this.
Great news for anybody here, though: if you can unbork sales/marketing/etc for a software company that ability is quite lucrative indeed as a consultant.