First: "Half its existence". Thanks for making me feel reeeeally old.
2nd: "Before that, Disneyland was a place parents took their kids because they had to. No one went there without children." Where did you get that????? That's just completely untrue. Thousands upon thousands of families, went to DL because they loved the park. They went on dates, they went with friends, they had a blast. Space Mtn. had a line going all the way down Main Street when it opened, and it wasn't mostly kids. Kids weren't the ones staying until 1:00 AM every night during the summer. Dude, I was there. My friends were there. And it was mobbed! Always!
I agree Star Tours and Indiana helped bring even *more* people in. And SWGE will bring even more. And more. And the overall experience will most likely get more and more unpleasant because of the increasing crowds. Disney really is in danger of killing its Golden Goose.