Jim:
It's not about preventing the scattering of ashes (for everyone) but of seeking consistency. "
The church is no longer in a position to seek anything, certainly not how the bereaved choose to dispose of their dead
Temporal laws may well dictate such matters but the times they are a-changing, as far as the old order is concerned
If the Church plays its cards right and stays away from peoples' personal tragedies and out of their bedrooms they may still have a role in society

The church is certainly in a position to clarify its position on how the remains should be dealt with, if the person, or their relatives, wish to have a Roman Catholic funeral. If they are seeking any other form of funeral then the wishes of the church don't come into it.
If you wish to use the services of a business, you accept their terms, or don't deal with them. You can't insist that they go against their own principles in order to be able to deal with you. They are equally able to walk away from the transaction.

As for keeping the Church away from peoples personal tragedies, then that is for the people concerned to decide. Many people take great comfort in the presence of a priest at such times.
You are of course welcome to your own views, and to avoid the use of priests.