US homes are relatively new compared to many of the homes in Europe, so I'm not sure why you're calling them 'old'.
Also, Europe's prevalent masonry construction might "feel" solid, but that doesn't equal a high level of "building standards". A whole lot of western safety/environmental/plumbing/electrical/accessibility standards have changed in the past 20-70 years.
Much in the way chrome-adorned '60s US cars "felt" solid, and older people scoffed at the inornate "plastic cars" of the '90s, this perception of quality didn't translate to actual engineering superiority.
Also, Europe's prevalent masonry construction might "feel" solid, but that doesn't equal a high level of "building standards". A whole lot of western safety/environmental/plumbing/electrical/accessibility standards have changed in the past 20-70 years.
Much in the way chrome-adorned '60s US cars "felt" solid, and older people scoffed at the inornate "plastic cars" of the '90s, this perception of quality didn't translate to actual engineering superiority.
Some of the over-sized chintzy boxes that are built in the US are actually built to pretty dang good standards, i.e.: https://en.wikipedia.org/wiki/Florida_Building_Code