My guess is the OP never tried any good rain gear that's designed for hiking.

I have marmot rain pants and jacket that are fairly breathable and keep me dry while walking or biking. I even used the rain pants over jeans for skiing when I didn't had snow pants. It hasn't failed keeping me dry and comfortable.

It's getting close to a decade that I own them and the white inner coating of the jacket is flaking off, which causes it not to perform as well (and me having a case of dandruff). I got a replacement jacket from a different manufacturer (trying to be thrifty) but haven't used it enough to comment on it. The pants are still perfect.

Go and try some decent rain gear and not a plastic shell.

BTW, both pack small enough that I always take them along.