That's certainly true, mate. Centralized exchanges are much easier to use, and faster than decentralized exchanges. There's no doubt in that. But I believe that both will serve their different purposes in the mainstream world. For people who prefer ease-of-use and high liquidity, centralized exchanges would be the most viable option to go. However, if you prefer greater security, reliability, and censorship-resistance, then decentralization would be the only path to take.

The main reason why centralized exchanges have been so dominant since crypto's beginning, is because of the ability to become regulatory compliant. When something undesired happens in a centralized exchange, people can feel confident that their funds are protected by the government. Legal action can be taken, as there's a single authority in charge of everything. However, that's not widely possible in a decentralized exchange since you're the only person in charge of your funds.

Nonetheless, Satoshi intended that crypto would be as decentralized as possible. But, with centralized exchanges coming into play, his/her vision becomes more distant every day. Just my opinion