While you can connect RWAs on-chain, not all RWAs have a use-case.

What are you going to do with a toothbrush on the blockchain? Transact it for .002 ETH? 

It better be a golden toothbrush worth a couple grand if you want to bridge it to the chain.

I don’t want a toothbrush or a watch.  I want fractionable real estate.  I want title preserved on blockchain. I want to swap nfts attached to things because I understand the taxable event may be different.  I want assurance the thing is the thing.  Blockchain does that.