have you been to the parks since they reopen and seen how busy the tickets windows are?
If you haven't I can tell you that they are not busy at all, they might have 3 or 4 window open with only one costumer, and I have rope dropped all parks several times and have also gone later in the day. I don't think same day sales are a problem.
And yeah Disney will never release numbers, what might be a comfortable 10k people for you will not be for another family that might decide to not come.
Look at Universal, they don't offer reservations and have been fine with capacity, hitting only once, no huge lines either (30 to 40 min or less most times) no huge outbreak linked to it either.
Disney I think has a set number and they still haven;t hit it yet. They might be thinking that 60 min lines are alright for most guest.
Also reports from this weekend and
MDE showed longer wait times at some points of the day but not all day long. The informed visitor will come to threads like these and know what to expect from reports, the uninformed will most likely not care