Exporting your private keys is what you as a user need to do in order to have full control of your funds.
Remember that each time you create a new address you by default will also need the private key of that said address if you require a particular balance on that address or just for convenience. The QT wallet doesn't display that private key unless you the following procedure.
To start go to the "Help" tab in your QT Wallet and select "Debug window".
Go to the console tab, and enter the following command -
dumpprivkey <your R-address>
Note that this command will only work for addresses that are owned and within your wallet.dat
If you have encrypted your wallet.dat, it will need to be unlocked before you can export the keys. Follow this guide for details - https://support.komodoplatform.com/en/support/solutions/articles/29000024698-how-to-encrypt-your-komodo-qt-wallet