I would put the users of that phrase in two camps; the ones that think they are suppose to say it in response to anything other than what was prescribed to them (ignore these) and those with the knowledge/wisdom/insight to spot a marketing scheme and treat it as such. As others have already stated (kind of

) NECCESITY is the mother of INVENTION. I'll give a couple of examples (there are tons, these are just arbitrary choices, not trying to pick on anyone):
The Good (Mother being the neccesity of its invention): The "What Works, Works" spreel: Reels have advantages over spools, spools have advantages over reels. Both have benefits and drawbacks. This product combines the benefits and eliminates most of the drawbacks. A clever and thoughtful design, a new and very useful spin on a few practiced and proven ideas, and a success.
The Bad (Marketing scheme): The infamous "up/down" BC lever. A supposed "improvement" over a traditional inflator mechanism. Not only is it counter-intuitive (e.g. pressing up to "go up" and inflate, as opposed to venting during ascent when done properly), but it won't vent without adding extraneous mechanisms, moves the inflator away from an area where oral inflation can be integrated, is no longer a commodity item that can be easily repaired/replaced, etc, etc, etc. BUT, it looks good on a glossy full page add. It differentiates the product in the market, classic sales and marketing BS. So in the end, you lose real functionality, add complexity, add cost without actually addressing a design issue in need of improvement. This is clearly a "solution looking for a problem".
This is how I see it anyway. You don't need to subsribe to a particular philosophy to identify the utility (or lack thereof) of a new product. Just my $.03 (corrected for inflation)