It is NOT and never has been a MMA vs TMA thing, as much as people WANT o make it so.
It is a sport VS "too deadly" thing more than anything else.
The very small group that believes that sport doesn't prepare you for the street VS the very small group that believes that TMA doesn't prepare you for the street.
They are both right and both wrong.
Sport combat systems Of the FC/Full resistence type) prepare you for full contact and all that goes with it, and they do it on a level playing field ( physically).
The attributes you develop - speed, power, the ability to hit and hit while being hit, etc, serve you very well on "the street", BUT are limited to the ruleset one competes in.
TMA training has " no rules" but unless FC training is done. they don't build the attributes to be successful in "the street".
The point is that, if a person can't pull off their fighting in a controlled environment, ( no surprises, no outside interference, basically same weight class, etc) they will have less likely hood of doing it when the conditions are NOT level -
bigger opponent, multiple opponent, obstacle rich environment, lava