Yes though it’s not really a symmetrical comparison. Let me make an analogy: suppose for transport I’ve been using a public diesel bus and I’m growing upset about the environmental impact of this vehicle. Instead I buy an ebike which is exclusively for my own use.

When I do this the bus is still operating. For some people an ebike is never going to be an acceptable substitute. There are many reasons including age/physical ability, baggage or distance requirements, or a need to travel during bad weather. By not taking the bus, all I’ve saved is the extra diesel that was burnt due to my body’s mass being aboard the vehicle, a small contribution to the overall system.

If my own traffic is very low - let’s take it to an extreme and say I travel only a short distance once per month - then in terms of carbon emissions it would have been better to burn slightly more diesel than to have my own ebike. As my level of use increases, at some point it becomes more environmentally friendly to have the ebike.

Scalability isn’t a completely linear thing - when you are meeting a lot of people’s requirements simultaneously you end up with resources which are going to be committed anyway, which gives savvy users the ability to “freeload” on incremental costs only.