Comment by prewett

Codependency is when one person gets value for solving other people's problems for them ("saving" them), and the other person gets value out of having their problems being solved by other people (having a "savior").

Guess Culture is more of a strong value on considering the needs of others. It could be unhealthy: considering the needs of others and neglecting your own, but it could also be courteous consideration ("they just got over being sick, I won't ask them to help me move").

I suppose Guess Culture unhealthiness tends to be more neglecting your own needs and desires (and the your resulting hurt and anger that the other person needs to deal with), while Ask Culture unhealthiness tends more towards lack of consideration (ridiculous asks) or demanding (asks that have a question mark but are not really questions).