Many smaller banks require you to physically drive to the branch and wait in line to send one. They usually cost upwards of $40 and that's before currency conversion, which is done at a rate that may or may not be favorable.
Making a blockchain payment has pros and cons, but it has enough pros that the "only useful for criminals" argument is tired.
Don't platforms such as https://wise.com/ solve international wire transfer problems? I have experience with only a few currencies, but as long as you can do transfers in your home currency online you should be able to do the rest via Wise online as well.
In terms of costs, you'd have to go into details to really compare (e.g. some platforms claiming "no fees" are just subsidizing them unsustainably), but if you're converting from and to fiat currencies via something other than a stablecoin you might already lose more because of volatility.
I haven't experienced or heard of reliability problems with bank transfers, is that a thing?
It's always the same: entitled people from first world countries where the banking system actually works.
And despite all of that the cryptoverse still has middlemen and centralised platforms. Because not everyone has to run their own node. Be your own banks is not feasible for majority of human population.
They all suck. They decide what I can or can't do with my money. They can freeze my accounts, stop transfers, force me to share details and I can't do anything about it. I rather use crypto than any of those awful services.
Also, you haven't solved the question of middlemen. Now instead of mostly trustworthy Binance you would have to deal with the guy in the dark alley who pinky promises not to run away with your cash.