You're welcome.
Many people with young children seem extremely passionate about this, to the point of making you feel like you are shortchanging your chidren's "Disney experience", and it does make me doubt myself sometimes.
In my experience (I have five kids, most of whom are now teenagers), young children are the last ones to care about that sort of thing. And it's quite common for people on their first trip to discover that their kids, little ones and even older, would rather play in the pool/do other "little" stuff than go to the parks, and this happens both onsite and offsite. Not to say little ones don't enjoy the parks, but I really think only a certain percentage of kids want to hit the parks day after day (although I'd hazard a guess that they're a lot more common in some families than others, so it wouldn't surprise me if families with two commando parents are more likely to have commando kids, etc.). But I also suspect a lot of Disney-loving parents teach their kids to love staying onsite because they, the parents, love it.
I say this because
I am a Disney-loving parent who'd love to stay onsite, only my rotten kids won't play along.

We went and toured the DVC resorts last time we were in Orlando (we're timesharers), and I recently told the kids, "Hey, I think we could do a DVC unit next time!" and they
all voted against it.

I didn't expect my teenage boys to be excited about it, but even my youngest, who adored the Animal Kingdom Lodge and said she really wanted to stay there back in the day, said, "Nah, I want to stay at Bonnet Creek and do the lazy rivers."
Not that I'm really
opposed to Bonnet Creek, but I've been wanting to stay at the Contemporary since I was 11, and would love, love, love to get a 2 BR at Bay Lake Towers in 2013.

But, alas, I have failed to correctly indoctrinate my kids.

I'm guessing it isn't hard to do -- adults hanging out on the Disney Resort Board here at the Dis start to think it must be reality, so how tough can it be to convince your kids of it?

And if I'd just raised my kids to believe, "Only Disney will do," then I'd feel a
lot more justified in paying the extra money to stay onsite - "for the kids," y'know.
More seriously, I think it's a family thing. If you raise your kids to think you failed them by not having onsite vacations, they'd probably believe you. But if you raise them to believe that where you stay is not a big deal, and let's just be glad we got to go to Disney, they're probably believe that, too! So you're probably right that they're not going to care.
