Coinbase\’s KYC

I bought into btc on Coinbase earlier this year. I see they are steadily needing to comply with U.S. KYC laws.

My question is, now that I have the bitcoin on a wallet there, if I want to move it around and withdraw elsewhere, is there any place to do that without going through the KYC info? or would they need info to track that movement at any amount?

Also, does anyone know the pertinent laws as to why they inquire whether your money in bitcoin came from occupation, investment, inheritance, or mining? I suppose it's for tax purposes. What is the difference in accounting between the four?