GrassBlades - Mod for Preventing Accidental Plant Destruction
Some time ago, a request appeared on the FTB forums asking for a mod that would prevent weapons from destroying objects like redstone and tall grass. The author responded to this request by creating an appropriate solution, but didn't publish it on CurseForge at that time.
Now, potentially, this mod has become an exclusive for Modrinth, which is quite unusual considering it's designed for Minecraft version 1.7.10.
The mod's functionality is quite simple - if you're holding a sword, blocks that normally break instantly become immune to destruction. Importantly, this doesn't mean your sword passes through grass - rather, it just prevents its accidental destruction during combat.
Hint: if you actually need to destroy such blocks, simply crouch - in stealth mode, the mod's protective effect is disabled.