OK but I fail to a see where you and I disagree since much of what you wrote reinforces the importance of considering percentages when evaluating a company's commitment to an investment.
For a startup to invest $100M means it's committing its entire future to that project.
For a company like Disney to commit $100M means considerably less.
Given the size of its existing Parks & Resorts assets, Disney needs to spend north of $1 billion annually just to keep those aging assets from degrading. (Sometimes referred to as "maintenance capex".) Disney's
smallest Parks & Resorts capex budget in the last 20 years was $875M in 2003 when Disney was shuttering hotels in an attempt to preserve profitability in a post-9/11 downturn. Universal's
largest Theme Parks division capex budget was last year's $671M. Universal spending $671M is not the same as Disney spending $875M. Again, percentages matter.
Roughly, Disney probably should spend about $400M annually in Orlando each year on growth initiatives. This represents less than 5% of WDW's annual revenue and can be thought of as "product development". Considering that the New Fantasyland's total budget was slightly above that, WDW arguably should be opening the equivalent of a New Fantasyland every 1-to-2 years.
Even between the New Fantasyland, MyMagic+, and Pandora, Disney has been below that target for a few years now. The 2000s were even worse. With the rumored large capital commitment to be spread out over the next 6 years, Disney is aiming to accelerate its WDW investment.
The new project suggests that Disney's corporate leadership has recognized that WDW was underfunded in the 2000s, and that a large investment is needed to rejuvenate the product.