Interaction Design or Design?

Riddle

How could a interaction designer succeeds on a crap product? Or a great interaction design from a bad product?

Instead, i would put the design instead of interaction design on the product. Interaction design is a way to thinking about how to makes product good, but better thinking on how to make the product blending into people's using activity instead of only from interaction design's perspective. And definitely, the interaction design thinking follows up naturally.

For e.g., the elements of users experience, put the different design into a hierarchy of different design ( strategy design, information design, interaction design and visual design, etc). Which may scared the product producer, "do i really need such kind of Ds?", and as well, this also makes designer in wild, "how could i put so much Ds in my tool box to make myself capable?". And i guess this is one of the cause why so many guys cant agree with each other on how ixd should be, or UX should be?

But maybe the answer is simple and straight, the goal is something to be used in user's everyday life, and the aim is to make people get goals easier, happier etc. And back from this goal and aim, all the Ds can be considered as a design problem solving method/tool box which is ready for designer's use. Or even better put them into some method cards with smart questions ( as IDEO does) , to make this fun and fruitful. Maybe forget the names, not very bad, cause only results that counts.

And another riddle,
Do chopsticks or forks designer understand what's interaction design? If not, how could they design the objects?

"The truth that can be told is not final truth. The name that can be given can be changed over time." ( LaoZi ) , or, truth is constant while guys apt to give their own favorite name. Now, there seems too many Ds compares to the real insights on everyday life.