How many Exchanges support ARR and private transactions? How many wallets? Who are the Developers and what do they know about Zcash and zero knowledge cryptography?
It easy to say “we have 100% shielded transactions” and Zcash could easily do the same with just one hard fork, but they won’t yet because the ecosystem is not ready yet.
100% shielded transactions are coming but there are steps to take to get there, and the rest of the ecosystem needs to be on board with the transition. See @daira comments here: Announcing Zcash Blossom and proposed feature goals - #5 by daira