Yeah that's if your goal is solely to win. When you're using a lower tier, winning is not necessarily the primary goal, because you're using a bad char simply because you enjoy that char, and are prepared to have bad matchups so that you can enjoy the char you are using, so the goal moreso becomes doing well for that char's standards.Having a secondary is always a good idea no matter who you main
I guess what I don't get is that people use bad chars, then switch chars for bad MUs, but if you care so much about winning that you're gonna switch chars for competitive purposes, what's the point of using a bad char in the first place? If you care so much about winning that you're gonna change chars for it, why not just main MK, because by that logic, even when you're versing someone that isn't a particularly horrible MU for PT, using MK would still give you a better MU.
I'm not trying to change people's opinions or anything, or imply that you're illogical, it's just to me havign a secondary defeats the purpose of maining a lower tier char in the first place.