At least there is a place where people from everywhere sit and speak. Where do you find representative from fighting countries like Israel and Palestine and Russia and Ukraine sit on an equal table?
It's due to these countries if they are deemed to allow any of their representative sit in a table with other representatives for peace talks. The UN is in the midst of it as the mediator for all of the peace talks that shall be done. But if the other party isn't willing to cooperate, we won't see them sit in any of them and have a meal together. There is no solution to a country that doesn't want to cooperate despite with all of the efforts and coordination done by them. As said, they're not perfect but we shouldn't deny that they're doing its job.