I think that the devil is in the details. Imagine this situation.

Someone comes, takes your home and says "this is mine!".

Now you have to go to your government and prove that the person stole from you because it is yours. Some governments are efficient at providing this proof, some aren't.

Some countries in Africa have a huge problem with this. Where ppl go to other people's houses and sell them even though it is not theirs. And because it takes up to two years for someone to prove the ownership, sure the government will enforce the ownership eventually but two years is a long time. I've seen pictures of houses where the owner sprayed "This house is not for sale" to avoid this issue.

Now imagine a system where proving ownership is fast, nearly free and very hard to forge. The incentive to cheat the system is much smaller than before. Using a blockchain to handle proof of ownership is a great way to have a secure and nearly free.

Sometimes it is not about being able or not but how cheap / expensive it is and how slow / fast the process is.