The grammar structure からこそ is an emphatic form of から (because), used to stress that the reason given is the most important or essential one. It translates to "precisely because", "exactly because", or "it is because… that…". The emphasis particle こそ highlights the preceding reason as the true or decisive factor.
からこそ attaches to the plain form of verbs, adjectives, and nouns (with だ) just like から, but adds strong emphasis to the reason.
からこそ is used to take something that might seem negative or difficult and present it as the very reason for a positive outcome or attitude.
With nouns and na-adjectives, use だからこそ.
While から simply states a reason, からこそ singles out that reason as the key factor. Compare:
The からこそ version conveys stronger conviction and emotional weight.