These are not rubbish and show me the earphone for 15$ that matches them.
Whoever buys Bose should't expect audiophile grade earphones. But these have advantages: they don't block your earcanal (some people don't like that), they have a very well rounded and enjoyable bass and, as you understood yourself, they fit gorgeously well and are very comfortable to wear. Especially the way they fit makes them unique. I wish, other manufacturers were that creative.
Also, the customer service of Bose is outstanding. We sent in our 1st generation pair with a completely ruined cable for repair. Bose couldn't repair them, but they offered a set of the new version with 50% reduction compared to retail price. That, although the old pair was like 5 years old.
Soundwise it is everyones personal choice. There is no reason to insult people who like how they sound. Not everybody needs audiophile grade stuff.