This man speaks the truth.
Now, if I may share my personal experience : I made the jump from pad to stick about a month and a half ago. I've always wanted to but never really had the motivation nor the money to do it. Since I've gotten one as a gift, I had no more excuse so I started practicing hardcore. After over a month of consistent practice I'm still worse than I was on pad, but I'm seeing clear progress and finally convinced myself that it's not impossible to reach (and eventually surpass) my pad level. It's an immensely tedious and frustrating endeavor if you're competitive like me, but I personally really like the feel of hitting the big buttons and always hated shoulder buttons/macros, so I'm keeping at it.
I honestly think that you can be as good on a pad or stick. Saying "stick was made for fighting games" isn't really a good argument since you can get used to pretty much anything with enough practice. It's not like your knowledge of the game or your decision making will be worse just because you don't play on stick. I also personally know several amazing pad players that can compete with the best of the best in Tekken, Marvel and BB.
So really... it's just a matter of preference. The only incontestable argument that I can think of in favor of stick is being able to play in arcades... which honestly is a must if you wanna play in Japan or Korea (since arcades in NA are dead). Other than that it's just opinion.
That said, I don't regret switching to stick at all. I have confidence that you can be as good as you want on either thing as long as you work hard enough. Practice makes perfect!