As an observant progressive Jew who was born and raised in an orthodox home, I'm not sure I understand how that question relates. I think that maintenance and upkeep of our community spaces is very important, but I feel strongly that maintenance and upkeep of something that essentially contradicts an historical Jewish approach to how and why we observe things the way we do (and how we adapt our practices to the ever-changing world around us) is not only not important, but a very sad waste of our resources.

In case my position on the concept of an eruv is not clear: an eruv is an attempt to exploit a loophole in modern orthodoxy's accepted interpration of how we observe the shabbat. According to the consensus, it is forbidden to carry items on shabbat, but exceptions are made for items that are an integral part of our clothing and for items being carried in private spaces. I'm pretty sure that the God of Abraham, Issac and Jacob is not so blind and stupid that he/she/it doesn't notice that these "observant" Jews are checking very technical boxes in order to directly violate the spirit of the law they've subscribed to.

I remember the first time I encountered this behaviour when someone explained to me that if I wanted to carry my house keys with me to the synagogue I would need to wear them as a functional part of my belt. I remember how strange I found it, even then, that I couldn't just put them in my pocket, as nothing about carrying house keys seemed unnecessary (not even to a kid in the 90s), and carrying house keys in my pockets seemed a lot less like work than figuring out an artificial way to "repurpose" them and pretend that they weren't intended to unlock doors.

Smells like hypocrisy to me.