My pending post is wrong
There are an equal number of cardinal (counting) numbers. so the number of numbers and even numbers is the same (if you take a list of numbers, double each you now have a lsit of even numbers just as long as original list) .
nonthless there are different llevels of infinity
see “Some infinities are bigger than others” From cosmos as well as the excellent ted ed video on the “hotel infinity” paradox (linked to there)