And when the developers of the software (that the LOB wants) says "we only support db 'x'"...
We're not big enough to "force" the developers to port their applications, just for us.
We're not rich enough to develop all of our own apps.
So, like many (most) IT organizations, you have to ignore the idealists and Utopian views, and just serve the business.
Comments like "real SQL server" are unconstructive at best.