Correct. The UN charter is a piece of paper.
Pieces of paper don't do anything. They are not magic spells that enforce anything, and they only matter in so far as they are enforced by other actors with real power.
If you want to talk about what other countries with a military or trade power might do, go ahead. But the piece of paper is rarely relevant at the international stage.
With politics and most importantly international politics, there is no law and no right & wrong. It's basically actions and consequences and whether the advantage you gain from your actions is worth the consequences.
People and groups of people (nations) will press their advantage. We press our advantage every day. Most people driving frequently exceed the speed limit - why? Because you can get away with it. If one could skip paying taxes and get away with it we would have done it. The reason the tax skipping doesn't happen often is because the consequences of doing it are high compared to the advantage.
The US just pressed its advantage today because it could get away with it and with minimal cost.
"Article 1 (2) establishes that one of the main purposes of the United Nations, and thus the Security Council, is to develop friendly international relations based on respect for the “principle of equal rights and self-determination of peoples”. The case studies in this section cover instances where the Security Council has discussed situations with a bearing on the principle of self-determination and the right of peoples to decide their own government, which may relate to the questions of independence, autonomy, referenda, elections, and the legitimacy of governments."
https://main.un.org/securitycouncil/en/content/purposes-and-...