its not , fruit trees have seeds inside fruit , this is how its spreads and how it evolved, some animal eats it , and "fertilises the seed later" , most games hatre that idea and just make regular seed and never program you can "just plant fruit"
only game i seen do sort of it was "Eco" who had some fruit give seed when eaten raw , and dwarf fortresss(eating uncooked fruit and veggies depending on it gave seeds , also seeds were removed when brewing)#
i live next to national park and we had plenty of fruit trees who grew becouse "somone threw cherrypits away"
https://www.indiatimes.com/trending/wtf/tomato-grows-on-an-island-that-nobody-can-enter-thanks-to-scientist-who-pooped-in-the-open-348074.html
there is also that , so dont claim "realism" to downplay others when your claim is the unrealistic one.
by game mechanics could do that rabbits/racoons who eat fruit could spread berry bushes or trees , or that trees have chance to "spread every season" and lower chance of dying every season or something like that
i played many minecraft mods who had them and im fine it being rare , but it being super rare and "it dies in wild" more looks like bug then anything else , especialy considering no vendors sells them and its not rare seed like "pumpkins"
and while tree's dying its semi realistic , if its in climate it is from that dont happen(tho human induced climate change introduced some anomalies)
