Newspapers reflect the society in which they function. There are huge numbers of people who like reading about stuff that other people see as mindless trivia, and there will always be newspapers which cater to that readership.
The fact is, sport and what goes on in the sporting world is of huge interest to millions, so newspapers will cover sports stories.
The Financial Times sells just under 200,000 copies a day. The Sun sells 1.5 million and The Daily Mail sells 1.3 million.
All newspapers are declining in popularity as online news sites increase their audiences. Eight years ago, the FT's circulation was double what it is now, as were those of the Daily Mail and The Sun.