As J. said so correctly, echoing the words of Dayan Westheim, there is room for a baal nefesh to be machmir however that is for a baal nefesh who is machmir in all areas.
Again, we still don’t get to hear the responses of those that are against the Eruv.
My first issue is as above.
Secondly, the Rabbonim of the Yerushalayim Eriv have declared that this Eruv is better. Now even if you do not carry there (many don’t) I have never heard opposition to it.
So please answer these questions.
Do not give us a list of the Rabbanim who assur it. We all know this already.