This whole situation really depends on one’s financial situation and income needs.
If one is retiring early, say 55, and they could use the dividends/capital gains for a source of income, then doesn’t it make perfect sense to stop reinvesting them? You are already paying the taxes on them, so put them to use.
One thing that I haven’t heard about and maybe because you can’t do it, is if you are younger than 59 &1/2, can you stop reinvesting dividends/capital gains from IRAs or would this be considered a distribution?
It would not. Anything you do inside an IRA or 401K is not a taxable event except for explicitly making a withdrawal from it. People rebalance IRA portfolios all the time by not reinvesting the distribution and only after the distribution is made, they then decide where to reinvest the money inside the IRA based on whatever asset is below the target allocation.
Cheers
Big-Papa