Not to be argumentative, could you please point me to some of those examples?
I just checked scores by Shostakovich (Sikorski), Britten (Boosey), Berlioz (Peters), Ravel (Durand) and Brahms (Breitfopf) and couldn’t find a single example of a broken tie.
FWIW, the G. Schirmer style manual states that although a broken tie is permissible, they would prefer their engravers not use them. Gould does not seem to address the issue.
I do agree with you that they are unattractive. In my opinion, to break a symbol whose main objective is to connect is an oxymoron.