Many airlines also won't rebook you for nada if being late is your own fault.... so you could be facing rebooking fees as well. Right before Christmas, it's anyone's guess as to if there would even be seats on the next flight. (or if they will be in the same fare category)
Do as others have said, get an earlier train. If you can't, well book better connections next time.
Have had it up to the eyeballs of copping abuse from other pax because we've had to wait for/offload luggage of, late pax. Consider the other 2-300 people who will get inconvenienced if any slot time is missed.
Never ceased to amaze me how many people allowed a 1hr 30 connection domestic to international in Oz, then were surprised when the flight left without them. The plane doesn't board at departure time, it LEAVES at departure time, something which many pax these days seem amazed at!
Lots of the time, you can't just 'leave' stuff behind because of security issues. It needs to go with someone...