Is Blight one-shotting you instantly as you break a block just something you gotta risk when playing Hardcore?
Yesterday I lost a promising run because I broke a single Glowstone block and a Blight Zephyr spawned and one-shot me before I could even react. I was mining from as far as I could as I always do, but it wasn't enough, the fact that mobs spawn immediately aggroed on you and the speed of a Blight just leaves no way out.
You could say well don't mine Glowstone, too bad that most blocks that are useful have the chance to spawn a mob, and every mob has a chance to be Blight.
Is the way to play Hardcore seriously not break any block at all until you have six head hearts and prot IV armour? It sounds so incredibly boring but there are so many blocks that can spawn things and all it takes is a Blight spawn and it's lights out.