Why is Amazon using Text Fields instead of Radio Buttons for mutually exclusive options?

I have been trying to return an item on Amazon, and this window popped up asking me to fill in the bank details. Although they have used Radio Buttons in the first line for Yes/No question, Account Type options (Saving/Current) are shown in a text field kind of UI element.

If this is similar to choice chips (Material Design), Why are they using a similar-looking text field for the account and IFSC code input?

Segmented controls and the choice chips work best when there are at least three options. Otherwise, it can be ambiguous.

Accessibility: Although a rare condition, people with monochromatic and partially monochromatic vision will have a hard time differentiating the selected vs non-selected option in the current design.