I hope I never hear of you selling herbs or concoctions either, because
plants too come from nature and the sun and earth provide nourishment
for their growth, just like your grove.

One would probably claim that harvesting plants takes time and therefore
they're just making money off the time spent harvesting, but the concept
remains the same. Even grove ressurections take up time and energy, for
instance if one is not in their grove and have to walk to a forest to
get there. And since grove ressurections need to be done in an urgent,
timely fashion, they can often interrupt other activities. So in that
sense they could also say people are just selling their time, energy and
hassle, not their grove's abilities.

Penned by my hand on the 23rd of Chronos, in the year 415 AF.