Look. If someone is having difficulties sleep over an open position, it means it has hit that person's risk tolerance. That person should just close the position regardless even if the shares can still run 100-200% more.
Using your simple exercise example, if that simple exercise is going to agitate an existing medical condition, the personal choice to evade the "simple" exercise is the right thing to do
That is why i avoid using risk tolerance because the definition of risk differ. I have different risk definition from what you describe yours.
It is fairly easy to sleep with BRK shares. I was the one who recommend BRK to anyone many years ago and mentioned that there is not neccessary to sell so soon. I have not made any other stock recommendation in this thread after BRK.
I would say there are many mistakes I made if I have either heard undue influence or ignore meaningful opinion from someone. If i come out to say it is my personal choice without spelling out why. It feel like I am avoiding something.
Rather than using risk to equate volatility, I will stick to volatility. If I cannot live with volatility, i shouldn't be making an investment in any stock.
It is best to say that exercise A may agitate an existing medical condition and i try to look for an alternative one that i need to do so and it doesn't agitate an existing medical condition.