I find that the #1 reason people add those "simpler than Lua" homegrown languages in Enterprise is to allow non-programmers to program. This not only has a tremendous cost to develop (compared to something like embedding Lua) but it also creates the worst kind of spaghetti.

One of the most unhinged pieces of software I have ever seen was the one from a fintech I worked with. Visual programming, used by business specialists. Zero abstraction support, so lots of forced repetition. No synchronous function call, so lots of duplications or partitioning to simulate it. Since there were two failed versions, there are three incompatible versions of this system running in parallel and migration from one to the other must be done manually.

The problem is about 90% of the business rules were encoded into this system, because business people were in a hurry. People wanted a report but didn't want to wait for Business Intelligence? Let's add "tags" to records so they appear on certain screens, and then remove them when they shouldn't anymore.

In the end the solution was adding "experts" to use it, but the ones who actually knew or learned any programming would just end up escaping to other companies.