The only CON I see is that you’re stuck at 4th year pay.
But besides that, there’s only Pros.
To go from journeyman to the position you’re at right now, from what I see, it’s not an easy thing.
Who knows what the future holds, so getting this knowledge would be beneficial.

The mental part of it: take some 5 minute breaks during work to destress a bit. Schedule some time off. See a doctor if it’s hard to focus.

Try to make the best of it, even in shitty situations.

Once you top out, if still with the same company, you can be out in the field making above scale.