Researcher gives the same pattern basically every time

[NathanDSimon]

Issue description: Not sure if this is a bug or just a design flaw but either way it's extremely irritating.
When I put lost knowledge of any rarity into the researcher, the distribution of outputs is so far from uniform that it is frankly pretty ridiculous.
out of a quarter stack (16) of the same rarity (I tested all 4 so 64 total), a whopping 40 were the exact same tag (in this case, forge:mineable/digging_claws but I think it's just forge:mineable that has the obscene weight as when I used a pack that had mineable/aiot it essentially was 50/50 those two and virtually nothing else).
If this is a bug, please fix it. If it is intentional, still fix it, because I don't want to have to blow through an entire 64 stack of lost knowledge just for a CHANCE at getting that feature pattern, and I assume most people would feel the same way.
In all honesty, RNG-gated progression needs to not be a thing in general, but I'm not going to ask for a complete rework of the system in this sort of a PR.

Steps to reproduce:
Put lost knowledge into a researcher, then notice how wildly skewed the drop rates are

Versions:

• Minecraft: 1.20
• Forge: 47.3
• CompatLayer (only if on Minecraft 1.10 or 1.11):
• McJtyLib: latest
• RFTools: latest 1.20 ver
• RFTools Dimensions: latest 1.20 ver

Possibly incompatible mods:
N/A

Relevant logs, if any:
N/A