Some of this has to be about low cost selections - either poorly built structures, maintained finishes, or a combination of both - and generally low levels of QC.
Most of you know that I live in CX. I interact with DivCo West fairly regularly and asked, during the previous two winters, why our lane striping was in such horrid condition. (Recall: most of DivCo's work (at least, when they took over CX), was on the west coast - specifically, the Bay Area.)
Their response was that cold weather, salt, and plowing degrade stripe materials. When I reminded them that they don't use salt here (confirmed), they said it's the cold and that plows "rip them up". When I mentioned that I grew up in upstate NY and that my municipality repaired and restriped roads every ~5-ish years, their response was something defeatist about these are the materials available to us.
So, yeah: some of our construction projects feature inspired designs and materials (not referencing CX). But the firms undertaking them are also often guilty of using absolutely atrocious materials (crumbly finishing cement) and underplanned/underfunded QC (brand new, high end LED lamps that are not plumb or level). Given the level of detail attention I've seen during CX's most recent paving and striping (in progress), I'd say it's mostly bargain basement materials and "we're done - and it's close enough".
I apologize for the rant. I really like Winthrop, and absolutely love the new fountain!
Cheers.