We do not know enough to make that kind of a conclusion.  Sure Leo said that he knew about his illness for 10 years, yet we cannot conclude that he had enough information in order to take a course of action that would have had been more appropriate than the one that he had chosen to take - including the fact that many folks will fight their illness and even the idea of their mortality for much longer than is reasonable in order to expect any kind of recovery or any reversal in the degeneration that they might be undergoing. .and yeah we do not even know those kinds of specifics with any kind of level of detail or even generally, so we just might try to reasonably infer from what he had said.

I got the sense that Leo was purposefully being vague in his Farewell OP about specifics of his illness in order to potentially lessen the chances that some folks might read more details into his chosen explanation than what would be warranted. .and sure I suppose with any of us, we run risks when we choose to share any of our personal details.. and maybe we should not, even though Leo had stated some of the reasons that he had chosen to provide a kind of overview of the situation rather than details as a courtesy to some folks who he felt that he should provide some kind of framework to understand why he was going to be disappearing from the forum.. so maybe one of the lessons of how much Leo chose to disclose might be 'damned if you do, and damned if you don't."