“Eating insects has always been forbidden”
Because that is not a chumrah, it is the HALACHA! Chumros are typically way above and beyond what the halacha requires, and the only danger in them is when the chumrah BECOMES the halacha, and people unfavorably judge others who do not subscribe to that particular chumrah.
And now, after all this discussion, I cannot drink water or eat strawberries, because I believe I will vomit, even though I have never personally seen any tolaim. I once saw a video on strawberry infestation – ugh. I have never seen what came out of those strawberries on any strawberry I ever bought.