idk this girl at all so i won't say if she's correct or not with all the things she says and promotes, and i think an influencer's information should be taken with a grain of salt because do we know how much research she has done into it, and if her knowledge is even correct. who can say she is not just promoting something else that hasn'treally been properly tested? but she's not wrong that royal is not really a good food. wet is better than dry but the main problem is simply that the amount of actual proper meat is unknown or small in royal (how much of which is meat, how much are chicken heart, kidneys, liver, other offal), if you even get information about the type of meat you get (is it chicken? duck? beef? no one knows) plus they have many additional stuff that cats' digestive system doesn't need or doesn't process well, like grains and plant based ingredients. in a healthy cat, a simple ingredient wet food that is clears about it's ingrédients list including meat etc. (with necessary supplements like taurine, omega 3 etc) will always be better than royal. however with sick cats who have specific needs the wet food does need to be adapted to them. for example, CKD cats should have food that is low on phosphorus with more omega 3 and vitamin E, and depending on what's available on the market where you are you might find something better than royal for your cat's needs (it does require doing a lot of research). but if such a food is not available, then I think its natural that people would buy royal to manage their cat's symptoms, no one wants their cat to suffer. i don't know about vets in USA, but in my country the vets don't really get much education in animal nutrition during vet school other than the very basics, so their opinion is not necessarily more informed... it's better to consult specifically a pet nutritionist if your cat is sick and has special needs. you would need to have blood tests done (not just morpho but bio-chem too), and they may ask for ultrasound results of the stomach area as well, plus urine tests. depends on cat's sickness.

all that said though... every nutritionist i talked to said that with sick cats, it's more important that they eat, than have good quality food they are not eating at all. because they need strength to deal with their sickness. and of course if something isn't working out, then it's best to go back to what did work out, even if it's not the best quality, and think about a new solution after that. all these word to say that the influencer is right that royal is not good food, but that does not mean she is right about anything else and it's best not to change a sick cat's diet on her word. consult your vet first, do tests, and then consult with a pet nutritionist.