It's a shame, but surely she could minimize the loss somehow. I've been a webdesigner before now (when identified female) and it was quite possible to operate without clients knowing much about my private life.
As an artist myself I never reveal much about my life or politics in work circles and keep the two separate if possible. It seems only likely to court problems if I did.
(I mean in general, too, not just regards any trans related information). Staying neutral actually aided my business in different countries I'm sure, especially where they may be more religious where I not, or more conservative or liberal than I am, and even to the point of using a pseudonym that is very difficult to pin down to any one region/gender so judgements can't be made on that either. Maybe some would think that's not for them, but business is just business to me. The more the better.