스프링 컨테이너가 그렇게 편리한가요?

`GenericXmlApplicationContext ctx = new GenericXmlApplicationContext("classpath:apllicationContext.xml");

    TranspotaionWalk transpotaionWalk = ctx.getBean("tWalk", TranspotaionWalk.class);
    transpotaionWalk.mov();`
    이렇게 get bean 으로 가져오는 코드가 
    `TranspotaionWalk transpotaionWalk  = new TranspotaionWalk ();
    transpotaionWalk.move();`
    보다 더 복잡해보이는데
    굳이 bean을 해야하는 이유가 뭔가요~??