At the risk of falling back on my law school, statutory interpretation lessonsMy understanding is that the recommendation is for all processing ways, there is a period before the recommendation.

And in the datasheets for the developers. the recommendation is found only in the section on rotary development - there is no reference to pre-rinse in the sections on other types of development.
And of course from back in the mists of time (2015), from Ilford's then representative on this board (and one of the owners and Directors of Harman) Simon R Galley, this post:
[URL="https://www.photrio.com/forum/threads/fp4-and-delta.127258/page-2#post-1681180"]FP4 and Delta[/URL]
Which reads:
"I have already stated : We do not recommend pre-soaking our films, we do not believe it is necessary. BUT nor, done correctly, should it harm them, the risk is uneven development, but if you use a JOBO fine, if pre-soaking is part of workflow and you prefer it...fine.
I will always take the advice of our technical service staff in relation to our products, they are deeply knowledgeable with decades of service and very hands on.
From a personal perspective I have never pre-soaked.... ever, and never had a problem.
Simon ILFORD Photo / HARMAN technology Limited :"
That post was consistent with other posts made by Simon.