Can't really say that was the cause of this. I do ride but pretty rare that I wear my work boots now unless I'm working field tile or something. I did a lot of riding when I was younger but never had it happen on those. Back when I was working on the farm I'd get about a year out of them before the leather would go from the water/dew damage from working cattle, walking fence lines in the pasture and such.
Working wood in wet conditions I'll put on slip overs so the leather last better for me now. Wear them everyday to work which is inside on tiled floor.
As you can see, the uppers are in pretty good shape on these. They had the real nice lacing eyes and looked well made from the start.
Took them to repair guy but he wanted $50.00 to resole them. Paid $65.00 for them new so it was a no brainer. I do use my boots but just found it odd in all the different brands I've had over the years it never happened to any of those before. With or without Vibram soles. Quite frankly, these were abused less than those. They do have over 2 years on them but I've had a few others go that long with just stitching failures.