It depends.

If you do it via PF where there is an explicit mutual agreement in people watching a guide, or reviewing resources beforehand -- and they elect to ignore this 'agreement' then it is inconsiderate.

I don't necessarily think you can apply the same to Duty Finder, however, when the individuals are so diverse with no real agreement/arrangement or expectancy specified beforehand. As some people will prefer to do it blindly, guides are nice, but ultimately first-hand experience will always trump that. Realistically, by using DF over PF in this regard, this is what you subject yourself to, and sign up for.

Equally, if this is a mentor thing, then that's an entirely different beast, but in reality the same still does apply. If someone asks for an outline of the strat and doesn't necessarily follow the aforementioned advice then that can just as easily be attributed to learning the pacing and the flow, in addition to mistakes, versus outright ignoring the advice.