Yes. High level (male) gymnasts tend to be able to as well through training of high plyometric moments in vault, tumbling and rings. I started out around 1.5x bodyweight and worked my way up to 2x bodyweight in about 5 or so DL workouts so it's not that bad.
And yes, fast explosive movements basically adapt your body to quickly recruit your high threshold motor units and then most likely preferentially cause those to hypertrophy as well.
I see no problem with laboring under heavy weight and actually like it. Nothing like the accomplishment of pulling heavy deads off the floor or other heavy weighted exercises. Although it is easier to get injured under those conditions I guess.