Most Players wont see where their Stats come from, they tend to only see the final Stat since that is the one the calculations are based on. The splitting into those 3 groups has reasons for how Stats are modified.
Also a lot of times the racial Bonus can be 0 and not affect anything. Most of the time only the Tallness and Buffness actually influences your Physical Stats, and those would be mostly Racial Type percentual modifiers.
If there is Potions that make you stronger they also tend to be percentual Bonuses, which do get multiplied ontop of the overall stats. At least for normal Potions, some Potions might increase one very specific Stat, like how Coffee would increase Mental Endurance for example.