downward spiral....

[Tony]

If it's a hassle to get a tee time, then they are underpricing the green fees.

For example, they price a ticket to Disneyland high because they don't want someone to come all the way out here, and then have the park be completely full.

Yeah it's gonna cost a lot, but at least you can get in and not waste the trip.

As a frequent Disney visitor I know that the parks can close when reaching capacity, they have 4 phases of closure and progressively allow fewer type of guests into the park.
The happens mostly with The Magic Kingdom, the times have been Easter and Christmas. Phase 2 Re-entering or hopping park guest , guests arriving on Disney transportation and the phase 3 people, Phase 3 only allows guests staying on Disney property and Annual Passholders. Phase 4 allows no-one
Phase 2 happens every Christmas, Phase 3 has happened about 15-20 times the last 5 years,Phase 4 last happened in 2009

So to answer your example Yes in some instances you can buy a ticket to Disney and not be able to get in. The phases are temporary but might last several hours or a fair chunk of
a day depending on how quickly people leave the park and make room for more.
FYI this is Florida, Being smaller DisneyLand is a little more suspect to these temporary closures.