It's a surprisingly poorly written response from Marriott. It's a boilerplate first and last paragraph with what appears to be a hastily-composed second paragraph.

Starting any sentence with "Sorry to hear about..." seems crude and dismissive to me.

"Unfortunately, we have no control over what the hotels decide to offer" is dissembling at its finest. Of course, MI doesn't control what the hotels decide to offer... what they control is the QA process, which specifically lists items that will ding the property if not available. And they have significantly degraded the QA in the last few years. So, yes, they heavily influence and in fact control what the hotels decide to offer.