I think most of us would be fine with an "achievable goal" but that's not really what you asked for or proposed in your first comment and most of the people who say something like "I’m not sure what’s the point of focusing on 1.5C anymore" aren't offering new goals as much as they are throwing up their hands and essentially saying "oh well, what are you going to do". I'm not saying you think that way but that's the people who suggest giving up say the same things.

Too many people are just "hoping for a miracle" as if that's doing something. Or they think "technology will fix this before it gets too bad". It might, but it will be in spite of those people, not because of. If we want technology to save us we have to make investments today, not "when it gets bad".