Bob, you probably don't know this about me yet, but MLJJ should by now: I take my cars on multi-day, multi-state road trips regularly. I live in Texas. Those two facts alone should be all that's needed for y'all to know that I deal with the same things you do regarding bug-festooned radiators.
But I'm also stating facts about OEM radiator protection. It's simply not all that necessary on a car operated on public paved roads. Four of the last six cars I've owned have had multiple low-mounted radiators with no 'grille' as OEM: My current 718, a BMW 2 Series, a Nissan 370z, and a Subaru WRX.
I'm just saying it's not a design flaw. I'm not saying radiators don't get dirty and don't get dinged. Thing is, radiators are designed
to get dirty and dinged.
Think about it this way: How much more difficult would it be to clean bugs off of radiators if heavy plastic grilles (or chicken wire, or woven wire, or whatever) were installed that weren't easily removable? It's a question I've posed to others many times on other car forums.
For the next couple of weeks, look for grilles over low-mounted radiators on other performance cars you see out and about. You'll find many don't have any.
Just sayin' (and I'll repeat): It is not a design flaw. It is simply not necessary.