I'm assuming you are getting this from 1 Th. 5:2. If you continue reading to 5:4, you will see this:
"But you, brothers and sisters, are not in darkness so that this day should surprise you like a thief."
I would conclude from this that your parenthesis about "no one" is therefore incorrect.
Interesting take on your part.
My take is that the believer who is daily living and walking closely with the Lord is the one who is being described in II Thes. (that I often quote - and even put to song).......thus he/she is indeed ready for His coming at any time, and will not be surprised - not because they know exactly when He is coming (this contradicts His own words) - but because they are always prepared for His coming. They are always “alert”.
There is a huge difference.
Although God alone knows, and I cannot judge, it would seem to me that many who emphasize the immediacy of His return don’t seem to be living like they really believe it - or they believe how they live doesn’t make any difference when he does come........