The first rule of deep space is that you always help those in immediate need.
In this day and age, the number of calls for immediate assistance has gone down, as technology becomes more reliable and people are optimized to live without air. But still, the rule remains. No spacer would break it, and risk total, absolute censure.
Thus, when the first well-stocked Earth passenger liner passed by a disabled mining vessel, you can imagine the reaction from the Asteroid Belt.