Saeviomagy
Adventurer
Well, because a person doesnt have 1e books, or perhaps they just started 4e? If ToH can be made the same in 4e as 1e as you say it can, then why not play it in 4e? Why not play it in 1e? Then its only a question of preference. Otherwise, if it can be made the same, where's the issue?
Given that the tomb uses almost no actual rules from the roleplaying game, there's a question as to whether it's actually played in a system at all.