No, he was making the point that to attack the network through zaps you have to participate in the PoW and are constrained by Bitcoin. Basically saying it’s superior to likes (which it is) because they can be botted whereas Zaps that risk is lower, but because zaps are optional the whole point is moot.
Discussion
Do you think Nostr should migrate to a zap only system in order to mitigate the risk of these bot attacks in the furture?
No. Nostr as a protocol should have as many options as possible. Clients can opt to be zap-only but others find utility in reactions, having options will lead to better outcomes.
Right so have as many options as possible, but in the hopes of a sort of natural selection will do it's thing.