That's exactly what I said. You were asking why have RMD?VacationForever, there is NO tax free growth forever. See the following link.
Inheriting a Roth IRA - Retirement Tips
Inheriting a Roth IRA: Navigate Tax Strategies and Rules for Optimal Wealth Transfer and Retirement Planning with a financial advisor.retirement.tips
Basically you have to take it out in 10 years, unless you are a spouse of the decedent, and a few other minor cases.
So I still ask, why do they want to force an RMD on a Roth?