Lol - I was at most mildly indignant, not angry :lol:
One should be careful of giving advice in such a definite way though, as a beginner - other beginners might think the information is correct and base designs on it.
We are not talking about a half-wave rectifier, but about a voltage doubler. The half wave ripple factor of 1.21 you are referring to only applies to a simple, single diode half wave rectifier with no smoothing capacitor. Add anything else and you have to recalculate the whole thing.
Often, as here, you will see ripple voltages given as a peak to peak value, since that tends to be more useful. It means that the voltage drops by two volts at worst, from the full DC output, as the capacitors discharge into the load.