This is the whole "boundaries" thing that was mentioned prominently in a previous climate survey by employees. That sense of entitlement to our time and our family's time.
For me as a general rule, if the meeting invite is before 700 AM, it gets declined. Even 7 AM is very early to start ramrodding project scheduling meetings at people. Every formal prj mgmt course I have taken has always said BETWEEN 9 AM and NOON are the OPTIMAL hours to hold EFFECTIVE MEETINGS.
If it is during lunch or outside my working hours, and I did not know about the invite by the preceeding weekend (so I can plan with my family), it gets declined.
I make exceptions if the meeting involves people in multiple timezones, then I understand flexibility is called for.
But when the lunch invite shows up an hour before the meeting is supposed to start, it goes to my recycle bin!