I like having the option of remote sessions for a variety of reasons, but I choose when the sessions are in person and when they are remote. I would not like it if my therapist was deciding when we would work remotely (although I would accept occasional circumstances where she stated that we needed to switch due to illness or some other significant matter).

I am not sure how therapists can take advantage of remote sessions as it's a viable way of working. I think the important thing is to tell her that you feel that she is taking advantage - your experiences of being taken advantage of seems like fruitful therapeutic material. It is not your place to decide whether she is ill or not and especially not based on what she is eating. However, you could tell her that you don't believe that she is ill because that is about your process and how you trust/don't trust people. If you don't like having remote sessions, you need to speak to her about it.