That is just what I said: that is the formula for VA, not P, even though both have the same dimensional units: https://en.wikipedia.org/wiki/Volt-ampere and https://en.wikipedia.org/wiki/AC_power#Apparent_power. And they'd be roughly the same for something like a toaster, but if you happen to be interested in, say, the billed power consumption of a 30 year old fridge with a motor
Can't edit any more, but yes I see your point now, and my earlier comment was wrong; you can't get the watts of an AC device by multiplying RMS voltage and current. That will indeed give you VA. Watts = VA * power factor, to get real power. VA is always apparent power.
