It's a lot easier to make a bad batch of wine than a bad batch of beer. However, it's also a lot easier to make an excellent batch of beer than an excellent batch of wine.
I've been attempting to grow wine grapes for about the last 5 years. Between late frosts, hungry deer, and rose chafers it's been mostly unsuccessful. I did get enough white grapes a couple of years ago to make a couple gallons. And it's not half bad. But with trying to time ripeness, monitoring sugar and acid levels, adjusting everything to have the right starting gravity and TA, this stuff is really hard!
Just like kits make it easy to brew decent beer, wine kits make it easy to make decent wine. But someone that can take a couple hundred pounds of fresh fruit on the vine and turn it into a high-quality wine has some crazy skills! By comparison, I think beer is easy, but that's just me.