The point is that making a beer with a simpler taste profile is harder to control. The 7 hops wacky thing is easier because no one knows what it's supposed to taste like and there's so much going on any off flavors are hidden.

That being said, I like macro brews and crazy beers. They both have their place.

Most “cheap” beers use lager yeasts and have subtle flavours by moderating the yeast temperature. Temperature control during fermentation is probably the most important factor, and many new home brewers do not have the equipment to control it yet. Furthermore, ale yeasts are usually happier at room temperature and more forgiving for unexpected flavours (than lager yeasts). So whilst you are right to say cheap commercial beers are “easy” (for commercial brewers), they are actually harder to get a “good” result for most new home brewers. I always suggest beginners start with a basic ale.