Perhaps it is because Dima is more confident with his BH and is not surprisingly as his BH is well known to be very good.
Now, moving on to my personal experience for sharing purpose: My BH is more stable than my FH and I attack mostly with my BH. I love to move to my FH side to push using my BH to the far FH side of my opponent. It usually comes back to my FH side and I am ready to push down the line or if it is a bit high or if the ball has less underspin, then it is a BH loop kill for me down the line.
If by chance my opponent is able to loop to my far BH side while I am on the FH side of the table, then I have to rely on my footwork to cover the BH side.
However, from experience, the ball comes to my FH side more often than not.
p/s: I am assuming both my opponent & myself are right handed. If left handed opponent, then I reverse the sequence.
