Let's say there is a user lmicroservice. I'm on a UI team. I don't get to tell the user service team what, or when, to implement any features.

I'm tasked with making a page displaying all the users who have a birthday this month.

User API service can only search by user id, email, display name, or nickname.

Now instead of just querying the goddamn database, a one line fucking SQL statement, I have to deal with the user team, getting them to first off even admit that my use case is valid, convince them to work on the feature, coordinate with them to make sure the query works, sorts the data the way I need, etc, et. al, blah blah blah.

They already have the next 3 sprints full so I'm sitting on my ass for the next month before I can test.

Meanwhile they decide they're gonna implement a super generic thing, and so despite me working on code that we talked about using an interface we talked about, they implement something else so i have to throw out half my work anyway.

Then when I finally start using it I find, oh, it doesn't support a sort, only returns 100 results max with no pagination, so if there's 200 this month with a birthday fuck the 2nd hundred they don't show up because they're implementing bare minimum and the rest is slated for another sprint.

And it was then, your Honor, I grabbed the lead dev for the user microservice and tossed him off the 9th story of the building.

/sarcasm