If I attach the same engine to a 1,000 kg spacecraft and a 10,000 kg spacecraft in orbit, the 1,000 kg spacecraft will accelerate more quickly. If I drop a 1 kg rock and a 10 kg rock on the moon, they accelerate at the same rate. What is the difference?
I think what I may be asking is “why is gravity the a and not the f in f=ma.”
EDIT: BY all means please feel free to discuss, but I consider the question answered by u/mmmmmmBacon12345