That’s because they are designed to be turned on and remain on a minimum of 30 minutes after. Every fluorescent light I’ve ever used the same as an incandescent light has burned out in the same, or less, amount of time.
For example, we use light sticks in my workbench area. In the beginning I found they generally lasted six (6) months or less. After some time, I started leaving them on, even when I left the room for a short while. Since then, they last, well, seemingly forever. I’m still using those last purchased six years ago. Now my wife has instructions to leave the one over her washing machine area on until she is finished for the night. That one has lasted almost as long as the ones over my work area.
We only use the cfl bulbs where lights remain on generally over a half hour. Incandescent lights are used elsewhere although we are switching those to LED lighting here of late. They may be expensive but they do last longer and become cost effective over time.
I would buy the LEDs but the ones I have seen here are all 60 watt equivalent. I would like the 100 watt equivalent but they all seem to be the multi watt bulbs at 100 watt. Or hey are flood light sized bulbs. I don’t have the lights for that. I have no problem spending the money but have not found what I like yet.