A discounted cash flow model says a company is worth all the cash it will ever produce, adjusted for the fact that money later is worth less than money now.
Three inputs drive everything: how much cash it makes today, how fast that grows, and the discount rate you apply. Small changes in any of them swing the answer enormously.
That sensitivity is the lesson. Treat a DCF not as a price target but as a way of seeing which assumptions today's share price is quietly making.