In what way was the theory of continental drift lacking that may scientist not want to accept it

The continental’s drift theory is lacking a mechanism that could explain how the continents drift and what are the patterns behind it.

The theory of continental drift was first proposed by Alfred Wegener in the late 1912 but it wasn’t accepted until the late 50s. Wegener proposed that the continents were drifting across the earth, but he couldn’t explain the what was the mechanism that make the drifting possible.