Because they are two completely different things. One is the environmental cost of manufacture, and one is the environmental cost of usage.
Electric and ICE vehicles both have both of these costs. They are all different. If you want to compare things, you need to actually look at all four numbers, not take two unrelated numbers and comparing them for dishonest reasons.
Electric and ICE vehicles both have both of these costs. They are all different. If you want to compare things, you need to actually look at all four numbers, not take two unrelated numbers and comparing them for dishonest reasons.