Nothing wrong with a visual approach per se - and don't forget that the ILS protected area may be infringed in the US by traffic waiting to depart if the weather is better than 2 miles and 800 ft. So flying an auto-everything instrument approach when the weather is good enough not to need a full ILS could have its own risks......
Edited to add - see item 2.1 in
www.caa.co.uk/docs/33/FOD199802.PDF for further info on this.