It's a kind of apples vs pears problem:

You have a bunch of tooling that deals with apples. You have a clear conceptual picture of what an apple is and what it does.

Then someone brings you a pear. It's kind of like an apple but not exactly. Their pear however works well with some other toolscape that's beyond the shire. You want to do things with their pears.

You invent a way to put a pear inside an apple (docker in VM). That works but you lose some functionality and break some stuff in the conversion, plus now you don't have the clean conceptual integrity of your apple-only system.

This is a way to transform a pear into an apple.