The current top comment on the article explains the situation, and ATC are "not being assholes here":
>NorCal had a new interpretation of ILS approaches come down several months ago that tied the controllers hands with regards to ILS approaches during visual conditions... The controllers were issued guidelines that if it’s busy and an aircraft is unable to comply with the approaches advertised on the atis or maintain visual separation that its better to hold them until there is adequate space on final as it’s more unsafe to start vectoring 30/40 different aircraft to build the required hole for the 1 aircraft who’s company has a lame rule
>NorCal had a new interpretation of ILS approaches come down several months ago that tied the controllers hands with regards to ILS approaches during visual conditions... The controllers were issued guidelines that if it’s busy and an aircraft is unable to comply with the approaches advertised on the atis or maintain visual separation that its better to hold them until there is adequate space on final as it’s more unsafe to start vectoring 30/40 different aircraft to build the required hole for the 1 aircraft who’s company has a lame rule