excellent question afia and a difficult one.
In my opinion, I think it depends on how your children perceive you. children perception of you depends on how you react to crises (big n small) in your daily life.
so how do you deal with/react to adversity?
everyone has their own way …
do you cry all the time? stop smiling, laughing or behaving as per your baseline normal?
do you spiral into depression? or regress emotionally?
do you adopt the martyr attitude?
Does anger take over your life? or religion? to the exclusion of all else …
there are numerous other ways to react … none of them are necassarily wrong as long as those states are temporary.
In short if your children grow up seeing you languish and collapse under a burden of hardship … they will naturally want to protect you from further hurt/stress/pain/worry by not sharing their own issues.
children do as you do, not as you say … i already see this in my daughter who is only 3 yo yet.