Lew,
the intent of using dried chilis is to get a more intense flavor.
I think the reason that dried chilis exist is to have them year round..
Posoole is a staple and traditionally a dish served around the holidays. (At least in my family) I am sure there was a time when find ing fresh peppers in winter was difficult, but not so much anymore.
You can sub fresh, you just need to taste it and see if it is to your liking.
My mom is from New Mexico and she is a chile snob. She only likes a certain kind, says its the best. I think its called Chimayo or that may just be the city they come from.
Enjoy!