If you need to provide something for it to be accepted in a certain category, then you need to provide that thing unfortunately. Discussing it is highly unlikely to remove the requirement to upload HTML files when submitting to the HTML category.
Whatever you say in that discussion, unless Envato make chsnges in tge future, it can.and will only end with the reviewer telling you that it’s not going to be accepted unless you include HTML files… no matter how unique it may be.
The key point here is that your file could be the most amazing peice of work in the universe. It could be so unique that mankind have trouble comprehending its brilliance, until one day they establish a new religion around your item… due to the comfort and inner peace it brings to them. The magnificence of your work unites the planet into one… a united people, sharing the planet we live on, and stepping hand in hand towards a bright and prosperous future. People sing songs of your item, and name their children after it, for centuries to come. Children who will one day attend one of the many Luminal-dev memorial universities and high schools across the world. But it’s still not HTML, so it’s not going in the HTML category.