Not to flame you (and welcome!), as others have already replied.
Cruise conversation is absolutely relevant to TWDC as a whole. It’s as on topic as discussing DLP, DLR, HKDL, or Tokyo. What happens in one travel division or park can be important or at least a lesson to other parks.
As for side effects and the larger vaccine discussion, if you don’t think that successful vaccine rollout has any sort of effect on WDW, well ...
The discussion of travel within the US could be extrapolated for years as to how Americans will be spending their discretionary travel money. Those loans that are being taken out now on campers will affect families for 7-20 years in many cases. That's a lot of money not being spent on WDW, DLR, cruise, or other travel. It might be the most off topic tangent recently, but will still have affects on our travel patterns.
And our experience with this virus isn’t political, but it does affect when international travelers can return. That’s a massive amount of dollars to WDW.