When I said nodes, i meant layer 1 bitcoin nodes that would accept or reject a fork. On the second layer, yeah, if you're routing payments, you can't determine the asset. But USDT, for example, is not only the tokens on the network, they have a website, where you can set up an account and send USDT to it and get regular USD (fiat) that can be withdrawn to your bank account. In the event of a chain split, they can decide to only honor this service on one of the forks, of their choosing. This may sway (L1) node runners to go with the choice of fork that the stablecoin company/ies go with to not lose people's value on the network.