Ah, panel lines. On a 1/72 aircraft model, there's a very good argument to made that they don't exist in a realistic scale.
The point might be to get the effect you see when looking at the real thing. Which depends more on the condition of the aircraft, repairs and the lighting.
I would leave them. They've been an acceptable and predictable part of older plastic models for a long time.
The issue really becomes how to replace ones you've removed in the vicinity of joints because of filling and sanding. My own approach is to leave as much as you can. Consistency and a clean assembly means as much to me as anything.
Rescribing is hard and takes practice. If you go about removing the raised panel lines, use reference material to locate the ones you add back on. Don't just copy what the kit did. You'll want to get some templates for things like oval access doors. Folks seem to like using Dymo label tape as a guide. Anything softer and the blade will drift right into it.
Other options are to modulate your colors a little from one side of the line to the other.
My own favorite is to take a hard sharp pencil, and after the color coats, carefully draw along one side of the ridge. Then Clear coat. I think it's an attractive look.
Bill