pimpjoe,
I think you misunderstood him.
What he is saying is "Why not simply lose 10 perk points when you disco in a perk plane instead of half."
Right now you lose 100 perk points if you disco in a 262, 35 in a Tempest, 30 in an Ar234 or F4U-4, 15 in a Ta152H-1 and 4 in an F4U-1C.
Under his suggestioon you'd simply lose 10 perk points in each case.
If you weren't flying a perk unit, you wouldn't lose any points.