I don't see that as contradictory at all, but as complimentary.
The world probably is getting closer to ending, which means there is even more reason to preach the good news of Christ sacrificed.
In a cinema fire people are going to be rushing to that safe exit not sitting down and offering around their popcorn to each other.
If people feel the world has another 100,000 years to go they are more likely to be complacent and do nothing.
The most growth in Christianity does not happen in the west. -Because we are complacent.
No because that goes against the plain teaching of scripture. The longer the world goes on the more will drop away.
1 Timothy 4:1
Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons,
Matthew 24:10-13
And then many will fall away and betray one another and hate one another. And many false prophets will arise and lead many astray. And because lawlessness will be increased, the love of many will grow cold. But the one who endures to the end will be saved.
So on hearing someone say "The Christians one day comprising the 100% of the world’s population!' I would know immediately I was hearing false teaching and leave.
I disagree. It should drive us even more towards that small fire exit.
Not the same thing at all.
Must we?

I'll leave that to you to think on lol, I'm lucky if I can calculate my change.