"I personally felt that his ad hominen attacks on British architects were not the sort of thing a Prince of Wales should be doing because, apart from anything else, they put various people out of business"

This quote by Anthony Holden is referring to the Prince of Wales' criticism of British architects. Holden thinks that the Prince's ad hominem attacks on British architects were improper for a Prince of Wales to be doing. He thinks that these attacks were not just improper, but also harming to the architects' businesses. Holden is recommending that the Prince must not be using his position of power to criticize and put people out of service. He thinks that the Prince needs to be utilizing his power to help people, not harm them. Holden's quote is a pointer that those in positions of power need to use their impact to assist people, not injure them. It is a pointer that criticism need to be constructive and not harmful.