Cash has been relatively phasing out of developed countries for the past half century - it might not be here in a 200 years from organic technological advancement and usage. Most people, when paying with their smartphones, do not stop themselves and ask "gee, now that I don't use cash anymore am I contributing to a hypothetical eventuality of a cashless society that encourages an Orwellian state? What should I have for supper tonight?" Deliberately removing legal tender from circulation is a large endeavor as well; there no simple "this is beneficial for us, let's get rid of it". I'm also trying to picture the US intentionally renouncing its hegemony and announcing to the world that the physical US dollar is no longer in circulation and finding that slightly comical.
Providing any analogy from cash to crypto in ANY regard is simply never going to be bijective, so I would never apply the same logic. The entire point is that if I'm trying to hide "value" or "accrued value" from the government, crypto is and has been a considerably better option over other stores, including cash.