To be fair, an 800k home is not necessarily well-built simply because it cost a lot to construct. Construction quality, design, and proper engineering are all real things. However, there's also a level of reality that needs to be applied to any analysis of residential construction quality understanding that the quality of construction is going to vary greatly depending on local/regional building codes and a number of other factors.
Nonetheless, there are well-built homes located throughout our great nation. It's when people see 1% or less of construction as being "well-built" that it becomes a total farce. Then it becomes a failure to actually use the term as intended due to preconceptions and biases.