Yeah, thanks for either the sarcastic or just rude replies. I completely understand that when kanji combines that they take on different pronunciations. That missed the point of my post completely and saying that 7 is always なな. 7=7, not 7 = 7months (しちがつ), 7days(七日)。。。; but 7=7.
The main point I was saying is that when used by itself as a word I should not be counted wrong if I prefer to use the main reading of that kanji when used by itself. Combining to form different words is completely irrelevant as I know they can change (shichigatsu, nanoka…).
By any means, it shouldn’t be that difficult to add for those that learn better at one:one memorization. There is already a similar function to add synonyms in place. (Ex: me changing “raptor cage” to “long time” as raptor cage is completely irrelevant to me. If someone learns better memorizing raptor cage, great! But I enjoy having the option to add in an answer that is a match to the kanji/vocab that it matches.) This is the exact same thing but with readings. I and others may learn better with a different (correct) reading. Other people may function better with the current system (also correct). All I’m saying/asking is for an option to change it to better suit the individuals learning style.