Cut one open and you are looking at roughly nine parts water to one part everything else. The everything else is the flavour. Boil the water off and what remains gets louder, which is why reduced purée tastes several times stronger than the fruit it came from. Take 500 g of hulled berries down to 150 g and you have dropped 70 percent of the weight, nearly all of it water.
Skip that step and the arithmetic turns against you. Thin purée means more liquid in the pan. More liquid means more gelatin to set it. More gelatin brings a flat savoury note into the finished bear, and people usually blame that on the fruit. Reducing first is what lets the recipe hold at a sane 25 g. Batches that skip it come out pale orange and soft through the middle, then weep in the tub by the second day.
There is good news specific to this fruit. Strawberries do not attack gelatin. Pineapple and kiwi carry enzymes that cut gelatin protein apart, and a gelatin gummy built on either one stays liquid forever. Strawberry has nothing like that. Gelatin sets in it cleanly, so you can use the base that actually chews instead of reaching for agar.



