Anybody that thinks that interaction with other musicians onstage precludes interaction with the audience AS WELL is basically ignoring the evidence of their own eyes... There are uncountable numbers of musicians that somehow can interact with both the band AND the audience (and yes, there are some that can't! Is this you?
Surely not...
).
Is this just too hard for you to do, or is this just one more 'spin' to justify your choices?
Why do we keep sticking up 'artistic' reasons for something that is entirely a financial decision? There's no shame in that decision, why keep 'spinning' obviously spurious reasons for it? Just say the truth.
No-one to split the money with, and a cheaper overall cost for the venue, so easier to book. Nothing wrong about that...!