I totally get your perspective too: you could swap acceptance and denial. Capitalists accept the justification of the status quo while MLs deny it.
In the context of grieve I think Yogthos' perspective is more fitting: "Denial" is the denial that anything is wrong with the system and "Acceptance" of both facts, that the system is fundamentally flawed and that a pursuit of any idealistic one doesn't bear fruit is the necessary precursor for conducting a sober analysis