A good point, I think that is why I have maintained that while this is a good stock to own, I don't overbuy it.
It is one thing to own, say, a million shares (I don't) and it is another thing to sell a million shares, it would take several days even in a bull market. Worse yet trying to sell too many shares can drive the price down or keep it down. Selling this stock requires as much thought as any other aspect.