> And noone absolutely ever cared about what it's a bridge down there.

Just like nobody ever cared that the container isn't bridged to their LAN in the first place - in fact the isolation is a feature.

But you should care, it's only the most common building block of network isolation for containers/VMs on Linux.

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I'm not going to get into it further. I tried to explain nicely but you seem hell bent on complaining and not learning anything new. At this point the appropriate response is: RTFM, it's all in there, their docs are great.

If you don't have a clue about how things work under the hood and if you have no interest in learning anything, then stop complaining about imaginary technical inaccuracies.