Bitcoin has destroyed the rule of the third party
You truly believe in that? Everyone in the world is still using banks and centralized payment systems. Bitcoin and even all cryptocurrencies together represent an immesurably small share of daily transactions of the world.
Transactions have been made easy my personal experience made me discover that Bitcoin is the perfect payment gateway for companies and business for flexible payments across borders.
If Bitcoin was perfect, it would have been used way more. Try to answer yourself, why are companies and businesses not rushing to use it for "flexible payments across borders".