As someone who loves Jackfruit, i think the actual fruit bulb of one is much too sweet for a pizza topping.
What you are talking about is actually a byproduct of the fruit which is called the rags. Which can be cooked and eaten, as well as the seeds. Although in my opinion the seeds are much tastier than the rags, just boil them till soft. get yourself a fresh jackfruit and try it.
I think it's great that we can find ways to eat more parts of the jackfruit, but the fact that most Americans think that jackfruit is just the rags and not the actual fruit means that they never had a fresh one and instead fell for a marketing ploy.