Suggestion aint that bad.
30k is exhausting, 24k still is. Going down to 1:20k doesnt sound too bad to me. (for normal shinies while secrets would be unaffected)
Basically everytime i stop playing, its because a shiny hunt dragged too much of my motivation. I stop playing for weeks and so i observe it with other player.
1:30k is a big number with a lot of RNG involved. But it prolly all boils down to how much time people want and most likely can spent. Some people apparently can hunt 8hours a day for years, while other cant, but still like to shiny hunt.
With secret shinies and alpha shinies, there is still enough exclusive stuff to hunt/grind/farm for.