He's saying he doesn’t like landing on short runways, but at SWA at least they get more repetition that landing on them becomes more normalized and practiced

However, folks that fly heavies may only get a few landings a month. Of those, only a fraction may occur on runways less than 7,000’. Due to the lack of practice (confidence), perhaps the nerves get the brain to deviate from standard and dip a little low, not fully processing the ramifications of those actions.

I added the last part. But that’s what I think he’s getting at.