Too many people can't be bothered with good timekeeping nowadays. Those bad habits don't meld with running any form of public transport efficiently. If I’m late leaving the house to catch a train, I have to accept that I may miss it, but of course, there’s another one 30 or 60mins later.
In thirty years of travelling I’ve never been late for a check-in yet. (and I
don’t mean 5mins to close) One day I suppose it will happen, but I won’t expect special treatment when it does. I’ve been sitting on planes that miss their slots because of “special treatment” cases.
My personal experience is that the national airlines seem to be the worst for this. Posters have already made the point - don’t inconvenience your on-time pax for the indolent ones.