I get that everybody has their own preference but BIFL is more about quality of materials, durability, reputation of the company etc.
I've had wusthof handles break on me and they are a pain to replace.
How so? You just send it to Wusthof and they replace or repair it. Seems pretty BIFL
Another issue with wusthof is that the bolsters on their chef knives are way too large.
My Wusthof Ikons have no more bolster than my brothers Japanese set. I assume you’re talking about the Classic line of Wusthof?
You raise issues based on your preference but that doesn’t impact them being BIFL. They’re well made, hold an edge and Wusthof stands behind them 100%.
I dropped my utility knife once and it bent the tip. I shipped it to Wusthof and they took care of it, only cost me shipping. I also had a knife block that split, for that they wanted a picture, then they shipped me a replacement and asked me to destroy the old one. I used it in a campfire. Seems pretty BIFL to me.