Until the 1930s you could mail a machine gun straight to your door with no scrutiny. What point was there in arguing an individual right in the early 20th century when you could mail order a machine gun or TNT with no background check straight to your personal collection and people were literally inventing the precursor to the M1 Carbine in prison with the blessing of the warden. If you want to go back further to the 19th century, privately owned warships with cannons were owned, gattling guns, and everything under the sun by individuals (the main laws, were on storage of explosives/powder -- interestingly even up to this very day it's legal to possess but not freely store high explosives without any license).

You can point out certain collective broad groups like blacks didn't get a collective nor individual legal access to arms, but given how racist the courts and "scholarly" academic institutions were at that time it's no surprise they spent little time covering it and found little representation in the legal system and little scholarly commentary.

It was after the passage of the NFA and the GCA, the main gun control acts of the US, which happened in the mid 20th century, where suddenly all these militia fuck fuck games started to enter the chat (at one point, SCOTUS claiming short-barrel shotguns taxed by the NFA not being protected because the military didn't use them -- they were wrong but the defendant was a dead guy with no representation so it was a poisoned appeal case to set precedent and no one was there to show the light infantry at the time were actively using them).