Comment by Telaneo
You can opt to not add a passcode, but the option to skip on setup is hidden, and people generally aren't going to go back to the settings to remove it once it's added. It's a dark pattern I kind of get, but it's still not ideal, especially for a market segment like the elderly.
Again, I did that, but then iOS keeps asking until it reaches someone who doesn't realize that there's no option. Effectively you have to reject it regularly, which isn't practical in this context (the elderly)