Hashicorp's prices are not what i'd consider to be 'enterprise prices'. When we looked at buying "enterprise vault" a few years ago it was six figures a year for a relatively small install. It was basically "we don't want your business" pricing.
I mean, yes, it is a bit expensive. On the other hand, it also shows that it is nearly impossible to have an opensource product and be profitable at the same time, especially with dev/infra tooling like this.