That's true to a degree, but it ignores the fact that there are in fact a truckload of very good core games on the Wii. The big problem is that the ratio of shovelware to good core games is about 5000:1, so they don't get the exposure or the sales that they deserve. I've got loads of very good games on the wii - and most of them are actually 3rd party.
They changed in 2006 when they developed their so called blue ocean marketing strategy. In a nutshell, the theory behind it was "We aren't selling enough units (after the gamecube) if we try and aim the next console at non-gamers, we might reach a larger audience at the cost of alienating our existing market". So we got this horrible, cheap gimmicky console which was pitched as a fad buy. As hoped it attracted a lot of new customers but they quickly moved onto the next fad. It also destroyed the relationship with the people who can normally be relied upon to buy everything they put out. Hence the current fiasco.
3DS: 4055-2781-2855 Xbox: spamdangled PSN: dark_morgan Wii U: Spamdangle Steam: spamdangled