I agree with everything the OP said.
3+ years since this post was created and nothing have changed to make the snap store more secure.
A very old outdated insecure Bitcoins wallet named Electrum still in the snap store
This wallet have a known bug that allows for stealing funds that is being used in the wild and many have lost their money.
The official website of the wallet have this warning since the bug was discovered in 2018 yes 2018 and now were are in 2022: " Warning: Electrum versions older than 3.3.4 are susceptible to phishing. Do not download Electrum from another source than electrum.org, and learn to verify GPG signatures."
Still snap store allows this. What a joke !!