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It makes it easier in the sense of "better accessible", not simpler. The docker network setup and namespace management are actually quite complex.

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I don't find docker networking particularly complex, it's just a simple bridge and some iptables rules.

When you only need docker to isolate your dependencies, its unnecessary overhead.

You made a point about complexity, I'm talking about that, why are you talking about overhead?

As for overhead, what is the quantified measure of it? Like sure there's overhead, but exactly how much?

You don't need to run a network bridge because you want to run two daemons of the same kind.

I never said you did. I'm asking you to quantify the costs because all engineering and ops decisions involve tradeoffs. Just because something incurs overhead, or is on of several solutions, it doesn't mean that it's bad. It's just an additional factor for consideration. So what are the actual overhead costs?

Docker is not the only option when it comes to containers

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