Jehovah told his faithful and discreet slave in upstate NY what really happenend;
Jephʹthah’s daughter left her father and friends, and spent the rest of her life serving Jehovah at his tabernacle in Shiʹloh. Four days out of every year the women of Israel go to visit her there, and they have a happy time together. The people love Jephʹthah’s daughter because she is such a good servant of Jehovah. - My Book of Bible Stories
I don't know why everyone was so upset in this story all she did was move about 80 miles west to work at the tabernacle. What a grand privilege and honor to serve Jehovah in such a way! I'm sure it was a little hard for her at first, but she probably met new friends and she still had all her old friends who still visited her every year. As a popular young virgin she likely married a rich priest or a hot shepherd boy and started her own family. This story shows us that if we truly trust in Jehovah we will reap his rich blessings!