Steve Fitzgerald wrote:
Also, many people travelling at weekend are less familiar with dealing
with alternative travel options, whereas those travelling in the week
tend to be more regular travellers.

In the Underground network as a whole, certainly. But to Heathrow
specifically, I doubt it.

In general, having to use alternative travel options is an
inconvenience to most. But when it comes to airports, passengers are
under time pressure and passengers are carrying luggage.

All in all, I suspect this is already a very tight window and probably
the only opportunity to do it.

Fair enough. It would have been nice if (a) TfL had informed the
airlines well in advance and (b) the airlines cared and were willing to
pass the information on to their customers. Had I known before booking
my flight, I would probably have flown out a day earlier to avoid the
issue.

In any event, it's only the one station that's closed as there will be a
5 minute service into central London from Hatton Cross on all days.

Sure, but it's a pretty important station, especially given the time
constraints and the luggage issues that I mentioned earlier.