"Some are in the middle, like my LinkedIn account, or my gmail account"
Your email account is the golden key to all other accounts that send "forgot password" links to it.
Your email account is the golden key to all other accounts that send "forgot password" links to it.
But what happened was embarrassment, not their life savings being wiped out.
a) There is a nonzero probability that your bank can be socially engineered using information obtained from compromising your email account and anything that trusts it. b) An email account compromise implicitly means every service that resets/recovers through it has to be rekeyed. The subsequent cleaning of the stables can be messy, lengthy, and itself somewhat risky.
In particular, if you haven't already, enable MFA. If your email provider does not support MFA, change your provider.