I fed a Siamese exclusively for 14+ years on a mix of cooked chicken, heart, kidney and white fish
she died of a pneumothorax probably following a RTA, and was in good health up to then
there must have been some taurine in her diet from what I fed her - I'm not saying I would go down that path again, especially now there are good quality dry foods around, but it does show, to my satisfaction anyway, that there is still a lot to understand about the optimum diet for cats
and any warnings which originate from the vastly profitable pet food industry need to be treated with some caution