Problem with your long winded post is simple.
You make AutoCAD in 15 dimensions and 4 people buy it for 100 billion each for it then you release it for free because as you said you are now rich and have no more cost. You forgot about Autocad 16? Who is going to pay to develop that?
If the 4 people in the world that needed version 15 now see you give it way when you release ver 16 why would the 4 people buy it. Why not wait for someone else to buy it and you get your profit and then they could get it for free, save their 100 billion.
Everyone would be sitting waiting for it to become free.

Working on your premise we would all still be running on TRS-80 computers with 4 k ram and a tape recorder for storage.
The incentive to innovate to improve would be gone.

To the OP if you think it is OK for a student to steal because they have limited funds then would you mind if someone with no money at all took yours? Took your car, your house?
Why not if you can steal because you have limited money then by the same logic someone with no money should be able to take anything they want.