Is Sugar Ray Robinson overrated?

Once you reach the pinnacle of a sport and reach a legendary status it becomes hard to be surpassed. For example, it is exoterically percieved to the general public that Michael Jordan will forever be the greatest basketball player of all time; that is hard to argue against no matter who is on top of the game today. Guys like Kobe Bryant and Lebron James will forever be in his shadow. Whether it is true or not, people will always sway to Jordan no matter the circumstance, but that is another topic entirely. This brings me to Muhammad Ali, the general consensus of any casual fan will always say he is the greatest boxer of all time. Furthermore, to most "hardcore" boxing fans, many will say Sugar Ray Robinson holds that title. Has it become a norm to throw Robinson's name out there because every other "hardcore" boxing fans say so? Does it seem like no one wants to dispute that statement out of fear of being ridiculed in the boxing community and to be dissmissed with the statement "You don't know SHlT about boxing"? I'm not undermining Sugar's natural raw ability and inimitable talent & impressive amateur career, but it could it be the reason why he flourished so well was because of the era he was in. I can't really speak about that era he fought because I was not alive in that time, but it seems to me he fought in era where fighters weren't so "sweet". I've seen quite a few of his professional bouts and many highlights of his and although he had immeasurable power in both hands and had a wide variety of punches in his arsenal, I just don't see how he is the greatest of all time. His boxing IQ was good, but it didn't seem elite. Don't get me wrong, I think he would be a threat in any era, but I personally feel Marvin Hagler & Hopkins would have beaten him. Can someone give me logical and legit reasons as why he is labled "Greatest of All Time" to many hardcore boxing fans and convince me as to why he has earn that title. Your input is highly appreciated. Thank you.