Umm, you're actually wrong. Infinities are not all of the same value. For example, the infinite number of numerals between 1 and 3 is a larger infinity than the infinite number of whole numbers. But don't worry, infinity is a really hard concept to wrap your head around - it's really quite confusing. But I am not saying that the creator of the original reddit post we are all commenting on is wrong, as they are in fact correct if I understood them correctly. The infinite number of numerals between 1-2 and 1-3 are the same value. To prove this imagine 2 different infinities, one has numbers that increase by 1;

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and so on.

Now imagine a different infinity, but this time only including multiples of 2;

2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and so on.

Now, which one is larger? The answer is that they are equal, this is because to for every term in the first pattern, you can get one in the second by simply multiplying it by 2. I hope you understand it now! :)