This is more of an annoyance than hate. If you are used to 6 button, the extra two buttons can cause you to mistake the positioning of your fingers one row over on rare occasion. A lot of players have to waste some time assigning the far right 2 to “no function”. In some games those two extra buttons do something you definitely don’t want to do on accident. For example in Marvel 3. A mistake Dash or a Team Hyper Combo can leave your vulnerable or waste 3 bars of meter. Because many competitive players only play 2-3 games seriously they don’t care about playing some random niche games that my need the two extra buttons.
As for neo geo and soul calibur games, the buttons that would be used are LK, LP, MP, HK.
I personally never liked the uncomfortable “authentic” 4 button neo geo layout for fighters.
All that macroing buttons is training wheels and a crutch. If you rely on one button for multiple button presses, you are only hurting your execution in the long run. Operating less buttons is more efficient because you hand has to travel around less when it comes to split second button inputs. If we take it a step further, if you had 10 buttons and you set the extra 4 buttons to PPP KKK Throw and Focus, it makes it more complicated and ineffiecient to cover 10 buttons instead of just 6. You are reaching around too much when you can just press 2 or 3 buttons.
Not to mention if you ever go to an arcade, you will be assed out. That extra macro crutch button you relied on to focus attack will now be gone.
For me to not lose menu functionality I place the extra two buttons on the far right hand side of the stick.