What if you have another meeting after the scheduled meeting they are late for? Yes, you can do something else during that first hour, but then reschedule the second meeting? Would that require having to tell those that you are meeting with 'can we meet at this time for an hour, and I have another meeting after it, so don't be late?'
If you can't possibly cancel the first meeting, why did you schedule another meeting the same day? What did you expect to happen if the first meeting was delayed?
It's not uncommon for a CEO to have back to back to back to back meetings. 9am, 930am, 1015am, 11am. And then again 2pm, 3pm, 5pm, 6pm. So that's the perspective that americans have.
What you are suggesting, which might work in Spain, is that you schedule a meeting for 10am that might not start until 1230 and then, to be safe, you couldn't schedule another meeting until 330 or 4 and that might not start until 6pm.
That would be a really difficult thing to fold into the way Americans work if you want to get anything done, especially on a startup timeline. You don't have 3 months to talk to 20 potential investors if you are trying to raise money. You have to do that in a week.
