I think it's good that you think about it and don't just 'follow' her advice or think your T is always right about everything. That's very positive.

I personally don't think it's good advice. Also know though that T's don't always give the best advice. ;-) But maybe you could try to have a conversation with your T about this. Explain why you think it could cause problems and also mention that you kinda wonder why she doesn't think it's a bad idea.
I think it's always interesting to explore other people's ways of thinking, especially when the 'results' of this thinking are not exactly the same as yours.