Are architects capable of designing McMansions?

Pro tip: One of the more fun ways to hunt for real estate is to go to your favorite site and search the keyword “architect.” You’ll end up with a lot of zany McMansions, but among the chaff are some well-pedigreed gems.
While this sounds like an interesting exercise, it brings up an important question. Who exactly is designing the McMansions that critics revile?
One of the biggest critiques of McMansions is that they are poorly designed and their architectural quality is suspect. This might come in the form of odd proportions or a mish-mash of styles or a blending of features. Instead of a pleasing aesthetic, the McMansion presents a mass produced version of something that tries to nod to established homes but only succeeds in aping such residences.
Typically left unsaid in these critiques is who exactly put together these unpleasing designs. Often the designs for homes come from builders or developers. What they have in mind when designing a home may not be the same as architects.
I would guess that architects would prefer that more single-family homes are designed by architects. Not only would this supply more work, it would have likely lead to more architecturally coherent homes. The emphasis might be less on providing space, an impressive front, and the most bang-for-your-buck, and instead focus on beauty plus functionality. Of course, some homes could l look great in the eyes of some and not be very desirable (see some modernist structures).
Perhaps more of the focus should come back to builders and developers: what could they do to provide the features American buyers want while also designing more architecturally pleasing homes? The same McMansions might not be so bad for many if they had a better design or fit the neighborhood better. Some would still object to the size of the home – is it really necessary to have 3,000-10,000 square feet? – but at least it would not be in danger of easy attacks. The architectural coherence could affect the price point but might also help the long-term reputation of the neighborhood and builder.