You wouldn't be able to tell me the difference in experience between Rossi and Boldy from 2019-20 through 2020-21 if Rossi was healthy. All you have is an arbitrary draft cutoff date to scream "oh my gawd, look at how incomparable these players that are 6 months apart are!" Yet, you compared Mittelstadt's D+5 season to Fiala's D+5 and Mittelstadt would have been 8 months older if you lined up the timelines from when they were drafted. So 6 month difference is not comparable because September 15th. But 8 month difference is comparable because September 15th. Make it make sense.
Ok Captain Strawman, (is this the 4th or 5th strawman on subject to derail the main argument? I've lost count)
You seem to be uneducated in the ins-and-outs of youth hockey, both European and North american, so we will use public schools as the analogy so you can get a grasp on it.
Kids enter the school system based on age. One kid, let's call him Fiala, made the cutoff by 2 months, he is young for his grade, but he made the cutoff, so he is starting this year. Another kid, let's call him Mittelstadt, was not eligible the previous year because he missed the cutoff by being 2 months too young, but he is eligible this year so he enrolls with Fiala
Now, although there is eight months difference between these kids, they progress through the school system and learn all their core school fundamentals together. Now, when they are in highschool, should Fiala take the sophomore proficiency tests as a junior because he is younger than his peers? Everyone else in his class will take them as a sophomore. Would that make sense?
This is, in essence, what you are suggesting.
You are completely ignoring the year that Boldy was on the US development team, which is comparable to Rossi's year in Junior in your abridged cherrypicked scenario.
Maybe because there are two different paths (US vs Canadian) you can't wrap your head around how prospects are developed? I don't know, but by 2020, Boldy had a full extra year of coaching and development than Rossi.
The draft requirements stagger the kids and they are developed together, despite sometimes having an 8 month age difference.
It really is not that difficult to understand, I do not know why you are having such a hard time with this concept.