First of all it's not Blockchain, it's Blockchain.com, I think we need to use accurate names to avoid confusion. I'm not saying that it's worth to use Blockchain.com wallet, but actually you have control of your coins on this wallet because there you recovery phrase.
My mistake. I don't like Blockchain.com/Blockchain.info because it's a web wallet, but yep you can control your funds because you have your private key etc. In my opinion, owning your own private key is still risky if you use a web wallet, you can get phished, got dns hijacked, etc. Of course it does not always happens, however the risk is too high for me.