What he probably means is that pruning does nothing to increase transactions per second.
But it's helping with the management of the bigger blocks which indirectly help the increase of transactions per second.
You're not transmitting those pruned blocks. You may also be pruning important metadata and destroying part of the Bitcoin ecosystem.
I see this as a chance of building another service. Offer metadata from the pruned blocks. The way to go is to continuously design, build and improve, not to limit things. For every issue there is a solution that can be deployed. By avoiding issues and by refusing to research and develop new stuff we are putting ourselves in a bubble which will hinder our evolution.
That's very zen. You can sell more by making less. Groovy. That's right up there with increasing value by keeping block space scarce. That's like saying the deeper the hole, the more dirt it holds.