Here are some stats to work with.

100 pts 20% SR.

90% of all winners have 90Pts+

A TAB Fav in a field where 90% of field are 90Ptrs+ the Fav SR drops to 19% chance of winning instead of the usual 30%

The TAB Fav SR is 39% where only 50% of the field has 90Pts+

The SR drops from 100Pts down.

Try not to bet your selection if its showing 89Pts or less.
If you still feel you wish to bet that selection, it must be double digit odds.

Cheers.

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Cheers.