[tharakam]

"It is not really true that DNS is for people only" Yes, "Any problem in computer science can be solved with another level of indirection... except for the problem of too many layers".

DNS is one mechanism of adding a layer of abstraction.

[necovek]

No disagreement there, but this layer of abstraction (mapping names to unique numeric machine identifiers) seems unavoidable for the most part: even the OP does not propose doing away with it, just replacing one tech with another (eg. DNS with /etc/hosts).

So let's not make a general argument when there are specifics to be discussed — do you have an argument for why mapping names to IDs is an abstraction too much here?