Its not about the connection, it's the attitude towards it.
Its online ranked, no-one cares about results. No-one cares if you're top of the league. You gonna pull your cable to the top like wolfkrone? No-one cares if you do, no one cares if you don't.
You wanna train for an offline tournament? Train offline. You're lucky the netcode is so good you think it's a viable alternative. Maybe have a wired lobby.
I know some of you turn online results into offline wins, you probably did that with games with worse netcode, maybe it doesn't really matter that much.