MVS Only Games - AES Mode too?

Im sure this question has been asked before, but from what ive seen, some games like Super Dodgeball, etc. Even though they were only released on the MVS, why was the effort put into the roms to include an AES mode? (practice, etc.)

they dont have any fancy features just the basic home mode, adjustable difficult setting.

They had probably planned to have a home release, I'm guessing. Also, it really doesn't seem like all that much extra effort. Maybe a practice mode or something, but that's about as much extra as they're usually willing to give.