@newhere-
Please read what I wrote.
If there is a city which has streets less than 16 amos (and less than 600,000 people) everyone agrees that one can can carry in it with an eruv.
I wrote everyone agrees to the CONCEPT of eruv, and that there are obviously eruvs which everyone agrees to.
(I’d also like to know where you are getting that all streets are 16 amos long, but that has nothing to do with what I was saying)