I have been in some form of customer support for 20 yrs, the last 6 years with a major subscription website: yes we use pre-written responses (the USA alone gets over 20k emails a week), but there are two things to consider:
1 - the skill of the rep who knows whether any answers apply or just play roulette when they arent sure versus the one who will either let the supes know or tweak the reply and cut out anything redundant or unrelated
2 - the supervisor who doesnt keep on top of issues and discuss what response to send people and add new ones as needed.
Now, we're talking about a blatant bug on the site which one should log into and check first before opening their mouth with a stupid reply. The log file is optional, so there's no leg to stand on.
On looking for an alternative message handling client, we have been courted by a company who does in fact have this keyword system which automatically sends the initial response to people. We rejected that system on the obvious grounds that it would be terrible customer service to send a stupid reply then follow it up with "here's the correct response..."
Anyway, I think we know Disney either hires people for whom English is not a fluent language OR they don't manage their customer service team well enough.
btw I'm now Tier 3 and write most of those responses, as well as manage the help section on the website. The other countries take my queue and adapt what I've written for their websites. Oh, the power...
Why do this? Simple: statistics. Example: Last week Adobe sprung Flash 10 on everyone overnight. Those who have automatic update selected came to our site and couldnt use their subscription tools. That took making a custom response to let them know we were aware of it, maybe add some time to the account, and show techs within a couple of days HOW MANY PEOPLE got that "we know about it" type response to light a fire under their butts and divert more attention to that (admittedly there's plenty for all of them to do, but this needed higher priority than it was given). It helped to have the numbers.
How well a company can make this a seamless experience to users makes all the difference

Disney seems quite clueless in that department.