You're trying to create a false dichotomy, but neither player has to be traded.
There's really nothing to agree or disagree about here. You are just wrong. Biggio is a good hitter now (109 wRC+) and has been one on the whole for his career (107 wRC+), even including the injury ravaged 2021.
The disconnect is that you're suggesting a sudden regression at age 27, during a three week stretch where he's getting on base 50% of the time. That's fine, but I'm not really buying it. We need good players now and we have one. The Groshans situation can be resolved next year if we don't trade him.