Does fruitcake made with alcohol stay alcoholic after aging?
Yes, fruitcake will retain almost all the alcohol added to it, whether added before or after cooking. Whether you should make a non-alcoholic alternative is a matter of opinion and individual circumstances and not on-topic for this site, but if I were averse to consuming alcohol and someone who knew that about me sent me an alcohol-infused fruitcake, I would judge that to be inconsiderate at best.