Yes, the horror days of the dumb fighter, because it was the only class to which you qualified. That said, things did get fleshed out over time. From Elf as warrior mage "Class" and Dwarf as class to multi and dual classing, then actual warrior mage classes.
It reminds me of the catch 22 of job descriptions: the job is listed as entry level, yet it wants you to have X years of experience. I know to the classified writer it makes sense, but to your average person searching for a job it just leads to "how is this entry level?" or "how do I get experience before I get the job?"
Also, Percentile Strength, only X class gets bonus HP for high Con.
You know, the Elf as a Class and Dwarf as a Class was actually a BX and BECMI thing. They came out AFTER OD&D and even AD&D.
Originally, Elves could be a Fighting Man and Magic-User. However, they were only one class at a time, but could switch classes each adventure and advance in each. A Dwarf would be a Fighting Man.
After Greyhawk came out they had it so that Elves could also be Thieves (as well as Halflings and I believe Dwarves). The Elf could act as a Fighter/Magic-User/Thief as well but had to split XP equally between the classes (so a change in the supplements).
AD&D also let races be separate from classes.
Holmes reverted to the idea that Elves could only be Fighters and Magic-Users and could switch between them or had to choose. I had that original set of rules.
However, that changed quickly (probably because it had changed in the supplements previously) and later Holmes printings simply had it that the Elf had to be a Fighter and Magic-User at the same time that divided their experience equally.
I think this is how it translated that Elves came to be their own class (along with Dwarves and Halflings).
Of interest, this changed in BECMI D&D. Originally in BX and BECM an Elf could only get up to 10th level, a Halfling up to 8th level, and a Dwarf to 12th level. They could continue to advance in combat ability.
In GAZ 5 it came out that Elves could continue to advance, but would have to advance as a Fighter and Magic-User separately, though they could get spellcasting abilities up to level 20. Halflings could advance in an alternate class that would take them up to level 35 (GAZ 8). Unfortunately, Dwarves still got stuck to level 12 (13 max) though they could still advance in combat ability. Dwarfs did gain the option to become Dwarf Clerics instead of Dwarfs default class or what was basically the Dwarf Fighter (GAZ 6).
So, it was actually the other way around in that the Race as Class basically came after/evolved from the original races and classes of OD&D.