I'm hearing it as a spill over from ball golf rules. Basically, disc golf run-up = ball golf tee. Here...
You can use a (run-up/tee) only on your first drive from the tee box. If on subsequent shots if you can not get good distance without a (run-up/tee), you are not a well-rounded player and fail.
In ball golf, the tee sets you up for a stronger max d shot. Ball golfers have to practice also making long shots with out this assistance for shots further up the fairway.
Sounds like a connection they are trying to make to me. Just my $.02, ain't saying I agree or disagree.