I'm failing to see your point here. Whether or not it's a big deal in a series* doesn't change the fact that it shouldn't exist. It was very obviously meant to be a big deal, since the existence of lands is only relevant if the possibility of a lack of lands is also relevant. In other words, the only reason to have a random number of land draws in a game is specifically so that you can have too many or too few of them.

This is the design, and it's a bad one, a leftover artifact decision made 25 years ago but now irreversibly core to the game. Magic did not succeed because of this decision, it succeeded despite it, just as it succeeded despite countless other bad decisions along the way (e.g. reserve list).

*I also take issue with the claim that mana screw doesn't matter in a series, because the introduction of things like Plansewalker Points only happened because it has become painfully obvious that the skill edge in Magic (past a basic level of competency) is extremely low. Therefore "good" players had a hard time posting consistent results, in large part because so many games were decided irrespective of the quality of player decisionmaking. You would never see a system like Planeswalker Points in competitive chess, where even a slightly better player would win with extremely high probability.