Not all the people prefer decentralisation, as I see. Many of them would like to use centralised services like banks or brokers etc. They don't want to control their accounts and funds by themselves. For example hundreds of people are losing their private keys and doesn't understand that MEW support can't help them in this case 
well, I totally agree with what you say because right now there are a lot of decentralized wallets that have a lot of problems, I won't use that method, it's better if I use another wallet storage method that I think can be safer like a hardware wallet that I can store and control. fully.