I highly doubt that. Photoshop, even for 95% of users, is pretty heavy on non-destructive editing. GIMP did not have that for a very long time and is no where near feature parity today AFAIK.

Don't get me wrong, Photoshop sucks hard, Adobe as a company even more, but on a technical level most Photoshop users cannot transition to GIMP.

Edit: Although, I have to highlight that GIMP has made noticeable progress within the last years. I can now, finally, group two layers together and apply a drop shadow effect to the group, which correctly applies to all layers within the group. It's been quite a while...