If up to 75% of paying customers browsing on mobile use safari would you serve them a broken website? Remember that 100% of browsers in iOS is safari. Everything else is just Safari with a skin. If I could I would block apple users out with a warning about their broken browser but I doubt any business survive for long if they had a habit of leaving money on the table.
Iphone users aren't allowed to install Chrome. They want chrome, but all they get is a shitty chrome skin on Safari. It does trick a lot of people into thinking that they actually have chrome though.
