1) While redshirting freshmen may be less common now, I still feel like it's fairly widespread. I know quite a few who were either asked to redshirt, chose to do so, or were straight up told that they were being redshirted. Correlation does not mean causation, but I don't know if many would disagree with the overall claim that plenty of schools redshirt freshman during XC.
2) The training for HS and college is not similar—or rather, if it is similar, that's the problem! As I said in the original comment, yes: many previous HS talents did train extremely hard, pushed mileage, etc. and then successfully made the jump over. That said, if you were to take a broad sample of the top-ranked athletes over the last 30 years, most of their training is not highly structured, periodized, or workout-driven, which is what traditionally differentiates between the two. I would also disagree on the claim 'everybody has always wanted to run as fast as possible'. While that is true, the focus is not necessarily the same. The likes of Ritz, Goucher, etc. were certainly focused on running fast, but the emphasis was still on Footlocker at the end of season, and the time run was not the sole determinant factor in whether you got a scholarship.
3) When I talk about the 'racing components of XC', I'm primarily distinguishing between competition where the primary aim is to win and where the aim is to run a fast time—championship-style racing vs. record chasing. I'm not saying that chasing times is bad, but especially in XC (at least where I grew up) the focus is increasingly on the times you run, even if it's not necessarily feasible or fair to compare them. Nearly everywhere else in the world, cross country distances are not standardized—you could be racing anywhere between 5k-12k, and courses are often condition-dependent. The focus in these races is not to run fast, but entirely on racing to win against the competition around you.