They are only trivial in the simple case.

When you need a bunch of busy people in a meeting it becomes hard to book a meeting. If several people need to travel incuding get a visa it is hard to fit it all it between other meetings that refuired people caanot skip.

travel is hard when you are trying for the best deal across flights, hotels and such. many sites only guarentee prices for 15 minutes so you can't even get all the needed prices on a spreadsheet at once - particularly if you have flevible travel dates. I've booked a best price plane ticket only to discover it was the worst date for hotels and I could have saved money on a more expensive flight.