Earlier quoted context omitted.
Safari only matters in 10% of the world, plenty of countries don't need to worry with customers using Safari, as no one uses any kind of Apple product and those companies have more than enough to do with their local markets.
10% is still a big big big number. You can't ignore it. When website fails on someones safari you can't just say we did not consider anyone using safari or iphone. You always try to make it work on most browsers.
Local market is more than enough to keep ones busy and profitable.
See how many companies in Africa, South America or Eastern Europe countries actually care to buy Apple hardware to test Safari.