Varför trodde Tom Riddle att han var den enda som hittade kravet? [duplicera]

Varför trodde Tom Riddle att han var den enda personen som någonsin upptäckt kravet, när det var klart fullt av generationer värda saker?

När det gäller kravet:

Tom Riddle, who confided in no one and operated alone, might have been arrogant enough to assume that he, and only he, had penetrated the deepest mysteries of Hogwarts Castle. Of course, Dumbledore and Flitwick, those model pupils, had never set foot in that particular place, but he, Harry, had strayed off the beaten track in his time at school – here at last was a secret he and Voldemort knew, that Dumbledore had never discovered –

Deathly Hallows - pages 498-499 - UK Hardcover - chapter 31, The Battle of Hogwarts

Och:

The furore of the battle died the moment they crossed the threshold and closed the door behind them: all was silent. They were in a place the size of a cathedral with the appearance of a city, its towering walls built of objects hidden by thousands of long-gone students.

‘And he never realised anyone could get in?’ said Ron, his voice echoing in the silence.

‘He thought he was the only one,’ said Harry.

Deathly Hallows - page 504 - UK Hardcover - chapter 31, The Battle of Hogwarts

Och:

[Harry] was standing in a room the size of a large cathedral, whose high windows were sending shafts of light down upon what looked like a city with towering walls, built of what Harry knew must be objects hidden by generations of Hogwarts inhabitants.

Half-Blood Prince - page 492 - UK Hardcover - chapter 24, Sectumsempra

Jag antar att rummet av kravet inte var tomt när Tom Riddle hittade det för första gången och dömde efter hur mycket saker som fanns i rummet vid den tid som Harrys era kom. Om vi antar att Tom Riddle inte var en fruktansvärd hoarder utöver att vara Dark-Lord-in-training, varför skulle han tro på att ingen annan någonsin varit i kravets rum?

Kravskammaren blir vad en person behöver - kunde det ha varit att rummet manifesteras för Tom Riddle som tomt?