It's really not that hard-to-read or to-write. I have instructed dozens of young developers on that with almost no-supervision and no-issue. It's really pretty straightforward.
Also, I can replicate my validations at many levels down the stack: from the client to API-GW to the database model. All with a single definition.
Also, I can replicate my validations at many levels down the stack: from the client to API-GW to the database model. All with a single definition.