I’ve read some reports of people disliking both. The gene apparently magnifies sensitivity to the smell of aldehydes. But it doesn’t always happen. (Unlike, say, cancer or Alzheimer’s, this isn’t a big enough issue to have a lot of peer-reviewed research yet lol.)
Another (maybe the same?) description is that cilantro-loathers are extremely sensitive to bitterness, and even that many of us salt food heavily. Apparently salt reduces bitterness. Dunno about that, but I know that I’ve ridiculously over-salted everything since I was a kid. I salt grilled cheese sandwiches that I make with salted butter. I’ve worked to greatly reduce my salt shaker addiction.
I think my favorite factoid I’ve seen is that identical twins tend to either both love or both hate cilantro, while fraternal twins (raised in same environment, ate same food, have same parents, but their genomes are different from one another) don’t have the same tendency. Any time something shows up with identical twins but not with fraternal twins, geneticists get all excited.