How is this acceptable? (compiling 8000+ shaders on a brand new installation)

I already finished this project. In order to render alpha channel in the sequencer render queue, I had to go to the project settings and turn on “enable alpha”. The editor reminded me to restart itself. So I did, to my surprise, when the splash screen showed up, it recompiled 8000+ shaders again. 2 hours later, the editor was fully loaded. Then it started “preparing shaders (8,000+)”. Basically another day is wasted.
Who would have thought that this one tiny setting would waste so much time?

Btw, I have the shader optimization tool. But it doesn’t give me an opportunity to stop these 2 super slow processes.

How should I work with it like this?