While guests may not know the hows and whys, these sort of issues absolutely have consequences for them. The high cost of attractions is part of why capacity has been squeezed and not adequate.
You're absolutely correct, but still, Burbank is counting on a majority of their guests not connecting these dots, and I think they are correct.
EPCOT Center was successful. Attendance was far more on par with Magic Kingdom and the parks business so successful that it made up for the losses at the studio and kept Walt Disney Productions profitable. There’s a reason Disney is wrapping Epcot in EPCOT Center imagery, because EPCOT Center still carries cultural meaning.
There is a lot of pain on the balance sheet of a company like Disney when investing the necessary capital in the division to keep it relevant. However, it has before and can again carry the company through times of crisis in the other divisions.
Studios actually has the least to do IMO -- it's easier for me to spend additional time at EPCOT or AK than DHS.
One time when I think guests can become acutely aware of the capacity crisis TDO has on its hands, is when one attraction at AK or DHS goes down through the ever growing peak seasons of the resort. 3 major attractions opened in the last 5 years still have some lingering uptime issues, Tower has been under the knife for a year, RnRC has had bouts of 101itis throughout its history... it can get bad there quickly. At DAK, 1 attraction down nukes the park for the day. It's bad, and it's noticeable.
Build a park the size of two parks like EPCOT and it's hard to feel a capacity crunch. Build a park of considerable attraction density like MK and it can be resilient to scheduled maintenance of major attractions.