Greetings O'Darby, welcome here! :)
People will generally take one aspect of the truth in order to cancel all others out. (That's how we get all the "isms' that champion one truth over another).
There is an aspect of exclusivity...in holiness. That's what the New Covenant is about...holiness. People are so obsessed with "getting saved" that they tend to miss the bigger picture.
No one ism is true to the core of it.
The Old Testament is about righteousness and faithfulness. The New Testament (as I've stated) is about holiness. From a holiness perspective a person is "dead" if they are not alive to God in eternal life. Unless a person walks in the light of Christ they are deemed to be in darkness.
What modern believers tend to do is be less merciful than God, and more easy with their own sins. This of course is hypocrisy...acting the same way the Pharisees did. And there is no excuse for that since God judges righteously....without respect for who it is that does what...no respect of persons just the fruit of it. Righteous is as righteous does.
Did Jesus say that only meek Christians will inherit the earth? Of course not. Meekness is a pre-requisite to inheriting the nations. And these are not God's servants...but merely benefactors of God's goodness. They are deemed as guests at the wedding feast of the Lamb.
Then there are the saints. This destiny is indeed exclusive...to those who forsake all for Christ. The saints will dwell with God forever. Without holiness none will be even able to see the Lord. God is holy. But not just the holy are saved. No, the saints will rule over the nations of them that are saved. The nations will be filled with the righteous, the meek, the poor and needy. This is a universalist ASPECT of mankind's destiny. The wicked will perish in the lake of fire...the second death. And the hypocrites will wander forever in outer darkness.
For any more detail, if you are interested, I have a podcast and a book. :) I attach a sample below...
Peace and blessings. :)