As much as I loved Peyton and the Paley friendship, a phone call from her had no relevance to this storyline of Haley's. Even with Peyton's personal experiences, it was unnecessary, IMO. I cared more about the storyline involved Naley and Jamie. A Peyton mention would have just been wasted screentime, IMO. If there was going to be any kind of friendship moment, I would have preferred a Lucas and Haley one. That would have made much more sense to me. It's cool if someone wanted this to happen but Peyton had absolutely nothing to do with this storyline, or even the show at that point, so I was completely okay with how it did go. Besides, with the way the writers imply things to happen offscreen, maybe that's exactly how it happened - we just didn't see/hear it which is okay considering this storyline was about Haley (and her family) and not Peyton or Lucas who weren't even on the show anymore.
And I never saw it as Haley acting like she doesn't know anyone who's ever lost a parent. That doesn't even make sense to me; it's not like she used a line like that against anyone or in general so...yeah, I don't get how it could come across that way. For me, her behavior was irrational because she was suffering through depression. Most people who suffer with that disease isn't exactly rational.