Firstly, listen to your artist. They may have not done anything like this, but I assume that they've done plenty of other tattoos and know what will work. I can see that not holding up well over time. Also I doubt there would be much you could not later to touch it up or cover it.
If it were me, I'd consider doing the negative of what your pic shows... the lines being tattooed in black. It would be just as recognizable and I'd think that the lines would be able to be darkened at a later day when they fade. Just a thought.
Also, welcome.