I'll give you the figures of the lowest attendances for IL 2019/20 until suspension, and LOI for 2019, and you'll see you're completely wrong.
Warrenpoint - 249
Institute - 282
Carrick R - 621
UCD - 739
Finn Harps - 1,158
Waterford - 1,597
The point being that the bottom two clubs in the IL dragged down the overall average in both absolute and percentage terms, more than the bottom two* in the LOI PD.
And that's comparing 12th and 11th (IL) versus 10th and 9th (LOI)
* - I say "two", since citing UCD and ignoring Harps friggs the figures even more.
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