First, as commented, you shouldn't need form 2210 at all, with or without schedule AI, if you are overpaid in total (as you say) and your estimated payments were at least equal and timely (which you didn't respond about, although your case would need pretty substantial backloading to get penalty).
If/when you do underpay (not within $1k withholding and not within 90% of liability or 100% or 110% of previous year) or your estimated payments are sufficiently below equal and timely, then in some cases you save money by using AI, which is entirely optional as far as the IRS is concerned -- you may use it if you choose, and people typically choose to do so when it benefits them, but you aren't required to. Like other cases where you have an option, TurboTax is presumably programmed to check whether this benefits you, in the same way it (much more often) checks your itemized deductions to determine whether you save money by itemizing or not, and recommending accordingly -- although that recommendation I know from experience you can override, because there are cases where you need to make an itemization choice that isn't the cheapest.
Also as commented, to do AI TurboTax will need the 'quarterly' breakdown of both income and deductible expenses, although you are focussed solely on the latter. If you enter these amounts divided as 3-2-3-4 twelfths (not equal quarters) then the AI calculation should produce exactly the same result as the plain 2210 without AI, and I expect TT will automatically drop AI, producing a return that looks exactly the same to IRS as if it had never even considered AI. (From experience I know several other cases where it drops unneeded schedules and forms, such as 1116 for foreign tax that is all payor-reported and below the de-minimis limit.) Even if TT insists on including AI, although you are actually submitting and signing a return that includes some slightly incorrect information, it produces a result exactly and demonstrably equal to an option that is (explicitly) permitted, and I can't imagine any auditor(s) will penalize you for that.
If this still worries you, as far as IRS is concerned you also have the option to file a return without 2210 at all, even when you are subject to the penalty, as long as you don't want to use any of the special cases (AI, actual withholding, hardship); IRS will then compute the 'vanilla' penalty (if any) and bill you for it. If you can't get TT to drop 2210 entirely, which you are pursuing directly with Intuit, you could NOT e-file, print out a paper return, discard 2210 and erase or black-out line 79, and file the modified paper return -- which is now entirely correct and valid. Although a paper return will take longer to process, and cost you postage (or FedEx/etc).