"I don't know why people say a double-edged sword is bad. It's a sword. With two edges." -Kamahl, pit fighter
A piece of fine art is more than just a pretty thing to look at. Some artists' works become pieces of history. When people start forging a piece of history it is pretty bad. At it's most innocent a forger creates and sells a copy of an already existing piece of work. At it's worst, the forger creates a new work by forging the style of a respected dead artist and sells it as one of that artists newly discovered pieces. In the latter case you are altering historical records. If you don't find fault in that then there is nothing more to talk about, but I and many other people view such actions as particularly heinous. It should also be noted that there is a difference between a forgery and a reproduction of a piece of art. A good and ethical artist can make good money producing reproductions.
Furthermore, you have idealized the situation with the very large fallacy that you are building your argument on. That is, the assumption that people who try hard will always succeed. There are plenty of parents who try to give their child the best, but simply cannot give them the same kinds of opportunities as kids whose parents might not work nearly as hard. Sure, a lot of these children should not have been conceived in the first place, but here they are and they need help. Ignoring them only makes the problem grow.