People are focusing on whether or not Court played in a weak era, but I think that is secondary to the fact the Australian Open was an illegit slam and should not even be fully recognized as such. A weak field is different than the field that exists not even being present (the Australian Open back then). Competition and weaker/stronger era arguments are regular and will go back and forth, be subjective, and their value in rating players, are always topics; but this is something altogether different than that. Graf post stabbing faced such a weak field some years, the draws and field might as well have been some of Court's Australian Opens, and unlike Court that was at every slam, but atleast the field that existed at the time was always present. Same with Serena in some of the recent years, and Navratilova in some of her dominant 80s years where the field got super weak with Shriver at #3. The Australian Open was about the 30th biggest event on tour in Court's day, so not a real slam. If her ratio of slam wins was not so heavily skewed to the Australian (11, but 5-3-5 elsewhere) it would not matter so much, but it is.
And what is most key about Court's slam record besides the skew to the illegit Australian Open is her best surface was grass, but she relatively speaking utterly failed at the biggest event on grass- Wimbledon, where she won a very dissapointing (given her talent and skill level) 3 Wimbledons, in fact half the distant 2nd best player of era Billie Jean King who won 6.