In the prelim stage of course it does! The whole first year the supervisor has to deal with the imposter , I don't know what the fuck I'm doing , I'm out of my depth feeling.
By Year 2 you should be upgraded , with a light monthly meet up and you should be standing firmly on your two feet, of course, but at the start , a year before the start actually, the polished applications needed to win funding , DOES need a lot of input, even if you are a star candidate.
I was a very strong candidate, high distinction, glowing refs and I went on to a very successful PhD journey, juggling teaching and lots of work with my funder , conferences etc, but I needed a TON of help with my funding application, a year before I actually started my doctorate.
Honestly , compared to applying, interview and gaining an offer of place for a PhD, the funding application was a MILLION times harder, at one point I told my supervisors let's leave it, when they told me to revise my application for the umpteenth time.
That's the funding landscape I'm afraid. The deadlines are so short too, you barely get your offer before the deadline is looming , its very very intense, and that's just the nature of the beast.