Since the Watchtower says that the number of anointed stopped being called in our days, you have to ask yourself: What about the literally billions of Christians since?
If you say “the apostasy started in the second century so they were all deluded”, you still have to account for circa 356.000 Christians who lived before any apostasy and were convinced they were anointed. The people Paul wrote his epistles to.
Either the Apostles themselves taught a lie to hundreds of thousands of people.
Or the Watchtower is wrong about the meaning of the 144.000.