The question might come down to: which piece of data has a higher level of risk, your passwords or your credit card info?
Your passwords can be used without you ever knowing about it. Passwords let someone into every aspect of your life with, potentially, every secret bit of information about you that you hold. So, it is possible for someone with your password to completely take over your life without you being aware until it is too late.
Credit card use will be noticed on your next statement, or as soon as your card company posts its use. You also have several types of recourse to dispute charges and have them reversed.
One might suggest that credit cards can be used to set up new cards or other lines of credit, but the same could be said with the information provided by passwords.
Passwords are the higher risk. Credit card info has numerous mitigations in place to protect you.
So, if you trust your password manager with your passwords, there is no increased risk with trusting it with your credit cards. There is always the inherent risk of recording any of this sensitive information, but if you have already accepted that risk for your passwords, then your credit card info does not materially increase your risks.