that cautionary tale sound remarkably like a story my exgf told me, interestingly taiwanese too. i think she said something something about being a folk tale in taiwanese culture.
it's dangerous in invest in any relationship, especially one with a ML or WL. Maybe she was kind enough to give you a warning so you dont suffer the same fate, figuratively speaking.
Almost 20 years ago, I was once in a relationship with a kind hearted WL for almost 2 years. she didnt want my money - in fact she wanted to give me $100k to kick start my biz adventure at the time - obviously i didnt take it - its her hard earned money literally and business adventure can sometime go wrong (well it didnt but could have). At the end i have to end it as it as i realized I could never get over how we have met, no matter how infatuated I was with her at times. She end up marrying some other dude in a hurry and settled in NZ whilst still not over me. I checked up on her a few years later and was happy to see that she has grown to love that man deeply. Her husband is very much bigger man than i was - he knew her history although wasnt her client, but still love her deeply. I am happy for her.