I grow a container herb garden and I always have more than enough herbs for myself and all of my friends just from the patio pots that I plant. Plus if I wanted to it is easy enough to incorporate medical herbs into the regular veg patch or flower boarder.
Those gardens ARE beautiful - no doubt! Just don't seem too practical in my opinion.
Certain herbs are great for attracting pollinators and beneficial insects, and there's always the option of selling surplus at a farmer's market or similar--maybe even mail order or eBay