You're correct Ella. The salting bit was thrown out long ago, although some people still swear by it. It really does very little, & is quite ridiculous when you think about it. If you leave the salt on, your eggplant ends up uber-salty. If you rinse it off, like most instructions tell you to do, you're just adding back the moisture that the salt was supposed to draw out. And it is the moisture that the salt draws out - not any bitterness. If your eggplant was bitter to begin with, salting won't help it except for perhaps masking it a little.
Good fresh eggplant - especially if from your own garden - definitely does not need any pre-salting prep. The gazillion cultures that consume far more eggplant than we do don't bother with it & never did. It's just something we picked up in order to deal with sub-standard supermarket produce.