As an arborist.... trees do not heal in the same principle as we believe them to.
Maple trees are not known for having a strong CODIT principle.
CODIT wiki And tend to have one or more wall failures in the CODIT process which leads to decay/cavitation.
I do not see your tree as being a very expensive removal by anyone in the industry with skill. I do not foresee you having to worry about it coming down onto your house either. While there are structural defects, I do not see prominent signs of excessive water accumulation at the root base or soil upheaval.