Haha. I actually tried this.
My answer: I think there are 4 metrics for measuring taste— sweet, sour, bitter and the fourth. I can’t recall the name (it’s for neutral taste). The balance between these 4 create a stable taste. Tomato isn’t smoothly balanced on all.
Hence, if added alongside a whole bunch of other fruits, it has the tendency to disrupt the taste to incline towards one of the fours (say, more pungent). In order to use it without having this imbalance, the making process would get all complicated and unnecessarily precision-centric.
Just maybe, that’s why the ketchup industry hasn’t been able to produce more giants than Heinz. I know.