Most BJJ practitioners were told, at least once, that they should not use strength, specially if they are beginners, and that “technical” is an adjective reserved for those who do not use their physical attributes. Maybe you were told another version of this, like “strength does not matter” or “a little guy with technique can always beat a bigger stronger opponent”.
There is certainly some merit to these affirmations. A black belt who is little in size and weight will for sure beat a big guy that never trained a day in his life and that is out of shape, but there is a limit. An extreme example would be a 130lb black belt facing Hafþór Júlíus Björnsson who is six feet nine inches tall and weights 400lb. Can you imagine holding a guy that size in side control?
In fact, the debate technique vs strength is a false dichotomy. Good technique involves the efficient use of strength (and other physical attributes).
Robert Drysdale (ADCC and IBJJF world champion) recently put out a very interesting video discussing this aspect of technique.