That is a hard no. Wtf Make sure your lowpoly matches your highpoly shapes, be aware what normalmaps can and can not handle and use a cage or proper ray distances for baking. No need to fuck up your highpoly for baking.
Just to be clear. Nobody, ever, needed to inflate a highpoly to match it better to the lowpoly. I have never seen such a stunt in the past 25 years, 20 years of which we are using normalmaps. If you have tools that need such a thing, get better tools. The goal is to capture the highpoly as good as possible in as little…