Poor Dentistry

The longer I live in the UK, the more poor dentistry I observe.  Why would the dentist here pull out all the premolars when putting the braces on, when refuse to remove the breached wisdom teeth?  All the hard work of straightening the teeth with the braces is destroyed by the wisdom teeth pushing forward.  And apparently it is acceptable for the wisdom teeth to be sideway, whereas it does not serve a purpose as a molar but extra crevices for bacteria.  Absolutely nonsense.