There are three reasons, actually.
3.) To MAKE MONEY by investing in Apple long term and reinvesting all those dividends. Then buy more on the dips. You know, like Warren Buffett, whose Berkshire Hathaway now owns 5.99% of AAPL. As for the dividend, had you bought 25 shares of Apple in 2013, when it was $420/share ($10,500 total), you would now have 800 shares from splits. Had you reinvested those dividends, you would have 812 shares. The dividend is 96¢/share annually. Your annual dividend payout would be about $779.52. Since you paid $10,500 for your shares, the real dividend yield on your shares would be 7.4%. You would have $143,717.79 worth of Apple stock. Not a bad return on $10,500.
How much is Buffett's 5.99% of Apple worth? $163.2 BILLION. Be like Buffett.