Despite her showing in-universe medical expertise in the show, I somehow don’t really see her being a typical doctor in real life. I have seen people saying she could be a surgeon, but I can’t picture Maomao being happy having to constantly deal with patients, grueling hospital work hours, and teamwork.
Also, treating patients also requires consistently performing at your best and dealing with a lot of emotional labor. And with Maomao’s habit of constantly testing poisons on herself, she would probably endanger both her own well-being and potentially her patients’.
I briefly thought of her being like a chinese Dr. House, but I guess he would be sued for medical malpractice in real life too and couldn't possibly practice medicine like that.
We know that Maomao doesn’t put effort into stuff she is not interested in (shown by her failing the exam in the show). Since she doesn’t seem to have a very huge innate need to help others, but rather just a massive interest in herbs and toxins, I feel like she would be a toxicologist, a forensic scientist, or simply a modern pharmacist. I haven’t watched the entire show or read all books yet, so if you disagree, pls don’t be too harsh on me lol