My opinion (of course, since I am typing it on here) - for those who pay (money) to use the products here on BGA, it is not a tough ask to add some optional "are you sure?" prompts into the game. I should clarify my opinion - if BGA were a community project were everyone was volunteering hours and no one was making money, the 'reasonable ask' to the developers would be much different.
In real life, modulo your play group and or tournament settings, you can select a card to draft mentally or physically put it aside, change your mind, so long as you haven't passed the pack of other cards, choose another one, and go forth. I am aware there is already an 'undo' here on bga where you can mimic this; an optional 'are you sure?' would add an extra level of security for those who opt in to use it to ensure the action or card you selected is indeed the one you want to.
Depending on the platform, the clicks on bga can be easy or hard to do. Regardless, some of us just want to play our best strategic games; optional 'are you sure?' confirmations would help for this. We are human and make mistakes, the optional feature would help with some of these. Am I the only one who has misclicked 'reject placing greeneries?' . Terrible experience ( I think I won that game anyways but made it much closer than necessary).
(ps - Anyone played Lost Ruins of Arnak on BGA? That developer did a great job on the 'are you sure?" in that game. Whenever there's an action you can take and you are trying to pass the devs added an 'are you sure? You have X Y Z available?' ).