Misconception in Premiere regarding how to define sizes/dimensions for effects

I'm not asking here for help or a guidance how to avoid problems, I can help myself very well.

For me it's a strange misconception in Adobe Premiere not being able to define pixel based width and height for a pixel based media when resizing or cropping pixel based sources. Many of the effects provide percentage values only instead pixel values. Why is it like this? Just watch to the all the other Adobe Tools working pixel based like After Effects or Photoshop. In these tools it seems to be not a problem to implement it.
Please, Adobe, fix that misconception soon!!!
I'm really tired to always doing trial and error to find best percentage values.

Thanks!