This was how I found FreeWallet, I use this to store some Bitcoin, it was easier for me because it required only email login and password, I stumbled on some that ask me to write down recovery seed but it was stressful for me, stupid me, since Free wallet sync with my email I thought that's all that matters and I lost it all, can't log into my account anymore, as if Freewallet swapped my password and log in info.
Well, initially if you do not have an hardware wallet it is not a big issue but since you were storing your bitcoins at some centralized place that was accessible by username and password, so you were at a bigger risk because of the site was down or if they do not allow you to withdraw, there was noting you can do.
Always use wallet where you have your private key with you, so you have full control over your wallet.