Ethereum Wallet is very secure. But we still have to be very careful. If we are not careful we can get into trouble later. I don't use Ethereum Wallet because I use Trust wallet. It seems completely safe to me and has its own security guard. That's why I am using Trust wallet.
I think trust wallet is more usable as android user.
I have used safepal, atom and trus wallet.
Ethereum wallet is good, but I'm not familiar.
Many friends said Ethereum wallet is also secure.
And for example, I prefer to keep only bitcoins and nothing else on the Trust Wallet.
When I came to the crypto world in 2017, the etherium was stored only on MyEtherWallet, and I remember that there was only a desktop version similar to the site, and it needed to download the key file when logging in. Even then, these guys were concerned about safety. This wallet is still available and the mobile version is good.
But like most users, I use Metamask as an extension for chrome. It's convenient and I've been using this wallet for a long time.