>>79410667They give you funding you otherwise wouldn't have, which is supposed to make what was impossible for you previously, possible
If you have business idea A that makes money but needs a million dollars to actually be profitable, you can work your entire lifetime for that to get started or you can get it instantly from the investors in return for earning a smaller amount
If you have nothing that requires that amount of money then you don't need them, or don't have to care about your stock price
