Instead of selling BRK, I sold covered calls...

This is a good alternative.
Unlike selling high and buying back low, it does not require making any predictions about how far or for how long a price dip might last, and thus no anguish about when to buy back in.
If your stock is called away you can generally buy it back that same day.
It's a profit if the price has moved above the strike by less than the time value you garnered, which is the norm in this situation.

The main way you can "lose" if if the stock price soars suddenly, before you have made much time value.
When the price soars, buying back your calls is expensive.
But of course, if your stock is called away after the soaring, and it's an all-in price at which you'd have been willing to sell anyway, it's merely foregoing some upside you wouldn't have had anyway.

The old rule is worth remembering:
If writing any option, be sure you're pretty much equally happy with both outcomes no matter what you think of their relative likelihood.
Because sure as shootin' you'll get whichever outcome looks worst on the day it happens.

Jim