Why on earth would we want to "waste" the time of teachers and students on such un-"realisitic" problems? Its not like they would have to solve the usary equat

Why on earth would we want to "waste" the time of teachers and students on such un-"realisitic" problems? Its not like they would have to solve the usary equations in the fine print in a bank contract in the future ... and if we ever need people who have encountered systems of two (yikes!) equations, I'm sure we can outsource it to India and China and elsewhere.