Because nowadays it's not about finding "actual talent." It's about money. Back in the day, it was a LOT different. If you didn't have talent, you didn't get into the music biz. Nowadays, even if you can't sing worth a lick, if you can make money, you can get into the media.
It's called a band wagon. The bad artists make money because everyone likes them. These days not a lot of people can choose things (music specifically) for themselves so they turn to the majority to choose for them.