Saving your wealth to give it to your kids when they older is good and noble, but not having kids just because you cannot furnish them with enough wealth for when they are adult, is really silly and counterproductive.
Similarly, you might reconsider maxing HSA, depending on how much you spend. HSA has two benefits, a direct one which is tax savings, and the indirect one being actually forcing you to save money, which is useful for many people who are bad at planning and looking ahead. The latter doesn’t apply to you, obviously, if anything you’re overthinking it. On the other hand, with your earnings, and assuming two kids, using HSA gives you around 20% discount on actual healthcare spend. Take account as to how much you actually spend on healthcare, and consider whether saving 20% on that is worth not having extra kid.