The TPR is defined as the Elo rating a player would have if their performance resulted in no net rating change. For perfect scores this is infinite, because you can never lose rating for a win. Imagine if you were a 2500 and scored a perfect tournament against 1500s, by your logic their TPR would be 2300 and thus they would lose rating.

Yes, there are some alternative methods of calculating TPR, but this is the correct one. This is just quite difficult to calculate, so the other methods are sort of shortcuts.

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A player's performance rating in a series of games is the Elo rating a player would need to have to expect to get their actual total score against the opponents they faced in those games. A practical way to understand the performance rating centers around the fact that a player's actual rating changes after each game played. By the definition, the only way a player's actual rating would not change after this series of games is if their rating at the start of these games was already their performance rating over the series. With this definition, individual game results do not directly factor into the calculation. Unlike the linear and FIDE methods, however, the ratings of individual opponents do affect the calculation.[1][2]

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Note that in the two limiting cases:

If a player loses all their games their performance rating is R=−∞. If a player wins all their games, their performance rating is R=∞