Welcome to the forum.
All blades can benefit from thinning (to a point, if you go to thin, they can fail)… I actually think a thicker blade benefits more from thinning and/or sharpening at a smaller angle, than a thin blade does.
My .02 is usually just match what’s on the blade, see how it performs, then go from there… if you want it to cut better, lower the angle, if the edge isn’t holding up well, raise it or put a microbevel on.
On that particular knife, 15 might be too low and won’t hold up well, depending on how you use it. I’d see what’s on it first, then go maybe 1-2 deg. lower if you think it could do a little better.