I have for a while now thought that the ethical source licenses are at least trying to do exactly what open source licenses are trying to do, just within a human rights framework.

The SSPL and other source available licenses on the other hand basically just take away the ability to make a meaningful fork, making the project proprietary. Sure it makes business sense, but someone might still feel the need to make an FOSS alternative.

That doesn't make sense as far as I can tell. You would need to release the source code of the managed service you built around MongoDB.