I mean the ranger when it was created all the way onto 2e, had a clear theme.What did you mean?
Rangers were trackers and hunters who fight the dangerous elements of the wilderness. It was based on the concept of Aragorn who had skills to better track, survive, and hunt the monsters of the wild. Beasts, violent tribals, wild armies, and giants and giantkin.
Since D&D lacked a deep skill system, many of Aragorn and other iconic ranger type's skills were made into spells.
The 5e have copied those spells but forgotten what those spells where for. Because they've forgotten the theme.
Rangers are hunters, trackers, and survivalists of a fantasy world. Therefore if they have magic it would be pragmatic. And pragmatically, all rangers would not have either Conjure Barrage nor Conjure Volley.
And even if you see rangers as Half Druids, all rangers having these spells doesn't match that theme.
Thematically in Standard D&D, a ranger would rarely know these spell and then almost never cast them. Only in themed games would a level 9 ranger face enough CR1 or lower monsters to cast Conjure Barrage. And it would almost never be worth the spell slot.
If you are running a LOTR clone then you might have enough CR 1 Orcs in a fight to be worth casting those spells.
But aspects that are not part of the base D&D experience should not be core class or race features.