What I said above is the opinion held by the vast majority of people. What is better or worse is subjective and depends on your priorities. If you don't hold the priorities of an extreme desire to avoid any government involvement in money, then it doesn't make sense to use BTC as currency. I can accept the idea of using it as a store of value and an investment diversification similar to gold or other commodities and think it does have value there. But, I don't believe BTC or other crypto will ever be used as currency unless there is an extreme financial crisis which would likely lead to major wars and disruptions in government. And if that happens, a few people may become extremely wealthy if the world shifts to one crypto or another as a major part of a new global currency in the aftermath. I'll have other priorities at that point.
It does require paranoia, or if not paranoia, then certain specific non-mainstream political views to be in favor of community driven money as opposed to centrally controlled and universally defined and accepted money. I'm not passing judgment on people who feel that way other than that I don't believe their views and predictions are correct.
There is a reason things like defi are popular - they are fads and buzz words that will have their 5 minutes in the spotlight. I'm not saying they'll go away, just that they will have their small chunk of people who use and love them, but long term they'll be forgotten because they just don't provide much over the traditional system. They can make some people who are willing to accept the downsides feel good that you don't have to be part of the system and there's nothing wrong with that. But that's a desire held by only a relatively small group of people.
The existing financial system is not slow, in fact it's faster than BTC in the vast majority of uses - processing regular day to day payments. If you're looking to transfer large amounts of money, or send money internationally, sure BTC/crypto may be faster. But, in my opinion, I prefer a slow and careful process for those things. I think most people agree. You don't need to have a brick and mortar building to be a bank, there are plenty of banks in developing countries and even in developed countries that are online only with no physical location. They're still centrally controlled and part of the financial system. The reason banks pay low interest is not because of their brick and mortar building locations. It's because the Fed has set interest rates extremely low, lowering the cost of the individual banks to borrow money from the Fed, therefore lowering the rates these banks can charge for loans. And all that reduces the amount of interest they're going to pay out for savings accounts.