It's not exactly an architect who wears shirts, nor is it an engineer who builds shirts. It's more like... a person who thinks about shirts. A lot.
You should care because, let's face it, shirts are the fabric of society. Without them, we'd all be wandering around in our underwear. Literally.
Start by becoming an expert in fabric science. Read books, attend seminars, join the International Association of Shirt Architects. Oh, and learn to make decent coffee. You'll need the fuel.
Yes, but don't get too attached. Your masterpiece will likely be worn, washed, and worn some more before it's inevitably discarded in the depths of the laundry bin. The human experience is a brutal one, shirt.
No. That's just a myth perpetuated by fabric-skeptics. The Emperor's New Clothes was a masterpiece, a true work of art. If only it had been made in a more durable thread count...