That may have been true in the days of Sprout and Sapling when users could choose privacy by only giving out a “Z address”
It is not true in 2025 under Orchard when in practice people seeking maximum privacy end up leaking their “T address” every time they give out their Unified address (which can be parsed to reveal their T address):
Please be honest and stop pretending that most Zcash users have a choice. Many of us hate the privacy implications of unified addresses that were forced upon the network.