The biggest problem with the argument made by elon and others in this thread for the "diplomatic" solution is that they rely on Russia just stopping and never trying again. It's essential to their entire argument. But it falls down the minute you ask a follow up such as "why wouldn't Russia just try again when they've regrouped and rebuilt their military?" There is never a diplomatic position that Russia agrees to where they would openly allow sanctions to be applied on them for re-invading, that Ukraine could automatically join NATO for article 5 protections if tanks rolled back into the country. Russia's diplomatic position would be, we keep the land, any suggestion of NATO membership is a violation of the truce and we get to define any violation of a truce.
It's a completely "virtue signalling" argument in it's purest form. Yes everyone wants to see Ukrainians and forced Russia conscripts stop dying on the battlefield. Yes, a diplomatic solution can "end the bloodshed"....but that isn't the end of anything. This is a land grab by an autocratic gangster that espouses imperialism through traditional/cultural nationalism. He wants to rebuild a version of "Russian Empire" and i have no clue how people that argue for the "diplomatic solution" argue this away. Their answer seems to be, "if Russia can take it, then so be it". And I fundamentally reject that position.
Where I might concede some ground is that viking is probably arguing solely from an 'end the fighting position", whereas it seems stupidly obvious that Elon only thinks of this in terms of "the Ukrainians are messing up the global economy by resisting too long".