Input on RT's -RN's???

I am curious to find out why there isnt more avenues open and put out ther for rts to upgrade to rns. I know that after my program in 1993 i had all my pre-reqs to start the rn program already out of the way because they are part of my rt program. So if an lvn can upgrade to rn as so can an rt, how come more rts arent made aware of this?? or more education on open programs to become an rn(especially with the shortage in health care)???
Open for any&all input on this