If you’re trying to avoid being exploitable, the question you need to ask is, “If my opponent knew my strategy [not your exact hand, but just how you would play every hand in your range], could he take advantage of it?”

In the case of c-betting 100%, the answer is almost certainly yes, with aggressive check-raising. So then you need to think about which kinds of hands lose the most by getting check-raised and lose the least by checking behind, and which benefit more from getting folds on the flop, or don’t mind getting check-raised. Also you’ll probably just need to check and give up with some of your weakest hands.

When you think about which hands to bet and which to check back, you also need to consider board coverage, which is a big deal on boards with a lot of draws. Are there turn cards which would be obviously bad for your checking range? If so, your opponent can exploit you with big bets on these cards. Likewise if there are cards that are obviously bad for your betting range. So, for instance, it’s rarely correct to have all of your flush draws in your betting range and none in your checking range.

You’re right that the stronger flush draws don’t mind getting check-raised as much, but they also benefit less from your opponent’s flop folds (as hands that fold probably have little equity anyway), and can benefit from your opponent’s bluffs on the turn after you check back the flop. I’m not saying you’re wrong, just that there are arguments on both sides, and sometimes details of starting ranges and stack depth can make important differences.

Unfortunately there’s really no way to encapsulate the complexity of this in a forum discussion. If you’re really curious, you might investigate some of the high-end tools like GTO Range Builder or PioSolver. More budget-friendly resources include Expert Heads Up NLHE or Applications of NLHE.