The point is that you will be throwing money at something that will continue to fall apart. This money would be better used for saving until you have enough to purchase a decent bicycle that can be properly maintained/serviced. A department-store bike (most - not all) is simply not going to give you a good return on your money. A REAL suspension-fork would cost more that the whole bike did.
It's not a judgment call - it's simple economics. Live & Learn.