Variable Retirement Annuity - General Sentiment?

What are your thoughts on variable annuities as a secondary option behind conventional tax avoidance & retirement saving strategies?

I did some quick math and it seems like the yearly tax savings will beat out the extra annuity fee to the provider (at least for Fidelity’s Personal Retirement Annuity) and no IRS maximum is wild to me.

They also seem to have slightly better features in retirement than a conventional retirement account for distribution management and estate/inheritance planning.

I just can’t help but feel like I’m missing something and there’s an element of “too good to be true” going on because of my distrust for any and all insurance products.