I love blockchain, but I don't know if you can call it the most secure...
It is secure as much as you stay secured, have a strong password, 2FA activated and using a clean device(without viruses), but i have seen that blockchain is not allowing some users to withdraw their money sadly.
Can you point to article or where this is coming from? That would be odd for blockchain to stop users from their own funds.
They allow you to get the private key through their paper wallet.. so you should be able to import it into about any wallet.
Well it is not an article but i read here in forum that people are having not good moments with blockchain support as in other way they 'freeze' their wallets, also i saw that it is removed as a wallet in bitcoin website.
Link? They allow users to make backups of the private key into their computer to import. AFAIK, Blockchain.info never had a incident which the support refuses access to the wallet without valid reasons. If the support disallow user's access to the wallet when user does not have 2FA nor password, that's understandable, if not, they would potentially be allowing hackers to get into the wallet. Also, password is not sent to their server if you inspect the code. Any traces of them stealing Bitcoins can be easily seen.
That being said, Blockchain.info was removed due to the many security incidents that has happened.