The 0e and 1e ranger were more focused on tracking monsters and murder-killing them dead dead than preserving nature. The focus was "keeping orcs and giants from killing humans and halflings" not "protecting the wilderness." That's one reason why elves couldn't be rangers, they were too aloof and magicky.
Except as soon as Unearthed Arcana came out, they
could be Rangers, because NO ONE understood why
elves couldn't be rangers...
As for "
one reason why elves couldn't be rangers, they were too aloof and magicky", that makes no sense since Rangers eventually got
BOTH Magic-User and Druid spells...in 1E by the way, not "later". They were very much woodsy and good (a restriction), and one reason they stopped orcs, etc. was from ruining the forest and the natural order they respected.
That was the way everyone played them IME, yes killing giant-class foes, but also preserving nature because of their part-druid and good alignment. Nothing in the text supports either position IMO, I am just telling you how they were always portrayed IME.
Anyway, in pre-UA 1E, Gygax and others restricted most demi-humans, with the exception of Half-elves, to the core classes. The only subclass allowed to all but Halflings was the Assassin. Most non-humans couldn't be 4 out of 5 subclasses. Again, this was just to give humans something because they had no racial features and to help make them appealing against the other races.
Dwarf: Cleric (NPC only), Fighter, Thief, Assassin only subclass, 80% of subclasses not allowed.
Elf: Cleric (NPC only), Fighter, Magic-User, Thief, Assassin only subclass, 80% of subclasses not allowed.
Gnome: Cleric (NPC only), Fighter, Thief, Assassin and Illusionist subclasses, 60% of subclasses not allowed.
Half-Elf: Cleric, Fighter, Magic-User, Thief, Druid, Ranger, Assassin subclasses, 40% of subclasses not allowed.
Halfling: Fighter, Thief, Druid subclass (NPC only), so 100% of subclasses not allowed.
Half-Orc: Fighter, Cleric, Thief, Assassin only subclass, 80% of subclasses not allowed.
In total, other than Assassins, you had Half-Elf Druids and Rangers, and Gnome Illusionists that were allowed as PCs. Even
with Assassins, only 8 out of 30, roughly 1 in 4, race-subclass combinations were playable as PCs.
Nature loving came later as players and DM roleplayed them as such. Then they became more and more druidic and less LG serial killers.
Because that is how everyone I know saw them, from the beginning... not just in the end.
Fortunately, Gygax and others realized practically no one was using most of the above racial-class restrictions and got rid of several of them.