You've never flown a T21 then...
The language you use is very interesting and serves to illustrate a point. 'Forced' landing in a light aircraft and 'field' landing in a glider. Perhaps this is one of the main differences in mental approach. I wouldn't see a power off landing in a field other than the one you thought you were going to land in as any different to a field landing in a glider in a field other than the one you thought you were going to land in.
I have flown a T21. I have done my silver distance in a Grunau Baby, if it comes to willy waggling (Sorry, deficient in the willy department, can I show you something else?)
Of course there is a difference.......Sorry you can't see it. Big Pistons said what I wanted to there.
In another post you ask would it be different in a Cub, rather than a C172. Of couse it would, but it's different sorts of apples, not apples and bananas.
A forced landing in an aircraft is not the same as a field landing in a glider. It shouldn't be life threatening, but it sure isn't routine.