It is quite possible that, considering the effort required to find an editor and organise for that editor to edit an entire paper into LaTeX, compared with the effort required to write the paper in LaTeX in the first place, the additional effort cost of learning LaTeX may in fact pay for itself after less than one whole paper

And one gets all the benefits of a text document while writing it (grep-able, version control, etc.).

(It should be noted that if one is writing LaTeX, it is much easier with a LaTeX specific editor (or one with an advanced LaTeX mode))