Why the standard is strict
BHFH is for people who want to buy work made by a person.
If we allowed "a bit" of generation, buyers couldn't tell where the line was, and the label would stop meaning anything. So the standard is strict. There's no "AI-assisted" tier.
This isn't a verdict on AI
Plenty of people make interesting things with generative tools. That work just isn't what this shop is for, the same way a farmers' market isn't a statement against supermarkets.
The trade-off
Being strict excludes some work that many people would consider legitimate. Honest artists sometimes have to think hard about a tool they assumed was fine.
We'd rather keep the claim narrow and accurate.