I don’t want to speak for others, but I feel as though the majority of those who are upset with this decision are more disappointed with the lack of creativity and heart behind it.
I am aware that both ROA and TSI are not wildly popular attractions, overflowing with guests. That isn’t the point. One might suggest these areas serve a greater purpose than that. that they were designed with a sense of timelessness, rather than the lowest common denominator.
Additionally, I would argue that if Disney leadership hadn’t spent the last decade dividing their audience and cratering their main IPs, they wouldn’t be cost cutting by destroying instead of expanding and appealing to that lowest common denominator.