Let's put it that way, i think the majority of arguments against the boost would still be true without the monetary aspect, but intent of Blizzard would be vastly different.
At end of the day, the value of the leveling aspect is subjective, i'm not going to convince a person that doesn't like leveling that it's important or good, neither are they going to convince me that skipping the leveling process is a net positive for everybody (emphasis on everybody).
But those are design / philosophical opinions, the second however a person has a monetary interest in an option, the dynamic of the discussion becomes vastly different.
A lot of people straight up said that "everybody who dislikes the levelboost is a mage booster who sees their lost profit", essentially stating that they're solely against the boost because it reduces their customerbase.
(A terrible argument by the way, those booster mages made a fortune due to 2 week pre patch).
This is the same story here, does Blizzard believe the "superior" way to experience TBC is straight up skipping to Outland or are they offering the option because they can sell it at 2/3 of the price of a AAA game?
If they believe it's superior option..why not give to everybody?
Why is there an additional paywall?
It's not because they need the revenue to finance the development, don't give me that BS, Classic launched without additional monetization and completely surprised them, TBC was far smaller in scope (Blizzards word, not mine) than Classic and certainly did not cost more to develop on Blizzards end.
Neither is it about character copies of Classic servers, that's a completely seperate service, which isn't even included in the deluxe edition.
It is such a vastly different situation when somebody makes in a subjective debate a given choice when it's clear that they can and will monetize that option.
I don't disagree, but the reality is also that those services would not exist without people engaging in them.
I don't hold it against people on a personal level, but i view them as part of the problem and frankly the way this works is that people that do not like MTX their games either have to deal with it or get pushed out, because players that engage in MTX are more valueable to companies than those that don't.