Why do we yield to a torrent of mental anguish and work-based strain before we ask for help? What makes us believe that we have to hold an unbearable and impossible load alone? When we know that the unspoken expectation to "soldier on" serves the folks at the top of the proverbial layer cake and definitely not us, why do we do it? And how can we stop?
All useful questions to consider, and I encourage you to reflect on your own answers, but for the most part, I'd say they're not the primary focus when it comes to moving on skillfully, because a) we know the answers already (cultural conditioning, capitalism, social pressure, systemic inequality, etc), and yet we carry on regardless, which leads me to b) the realm of "why" can lead us to conceptualising, excusing, ruminating, lamenting and bemoaning. Whereas the more constructive and change-making approach is to ask: what now, what do I/we need to do differently, how can I/we help to make things better?