You're not forced to use smartphones. I happen to live in China, and there are people without them.
You can buy tickets at the counter or vending machines, you can text or call instead of sending wechat messages, you can pay bills by card or direct debit, and supermarkets all accept cards (Chinese ones, that is) or cash.
People use wechat or alipay out of convenience. Just like people in the West use whatsapp, signal, fb messenger, telegram or whatever else there is. And some of those are testing payment service integrations (whatsapp pay for example is live in India since a few months ago).
You don't like it - don't use it. Nobody will force you. But if it takes me 7 seconds on my phone to finish a task vs. 2h in person, guess which one I'm choosing.
Edit: Typo
It's a bit more nuanced than that. Their servers are based in the EU and therefore a rather easy target for copyright lawsuits, and they have neither unlimited funds nor the manpower to fight them off (even if the allegations are completely unfounded, you need a lawyer to refute them, and lawyers charge actual money).
Sometimes it's easier to focus on your strengths than fighting the good fight on all fronts and go down swinging.