Because it's only actually easy of you remove the irremovable thing that makes it hard. This is one of those tropes that honestly really hurts the credibility of ML in the eyes of non-practitioners. Practitioners get really excited about some 75% solution, and talk about how this thing which is bad everywhere is really easy. The average listener doesn't realize how hard that last 25% (why would they? They were just told it's easy!) and end up writing off the whole thing as snake oil.