I think if it's just a question of "will this work" then the question can be considered lazy if the debated strategy is trivial; if however the asker is demanding "why will/won't this work", or the "will this work" refers to something laborious to implement, then the question is perfectly legitimate.
However even in the case of lazy questions, the information provided by the SE community will likely be holistic and of benefit not just to the asker, who will acquire an (unsought) insight into the relevant concepts à propos de his/her dilemma (which might well be germane to their wider project), but also to others who may have a wide range of queries or issues –if the question title is amended to make it more general and the asker is issued proper guidance on how to amend their question to be more general and generally more useful to the SE community.