The more full songs you learn and play, the more genres you play, the more changes you seek in the sound from intro to verse to bridge to chorus etc. the more you will come to recognise the usefulness and value of all types of chords - open chords, barre chords, power chords and more.
Power chords give a sparse, deep sound that can be all you need on its own for all or part of a song. Or muted power chords with all-down strum 8ths, say, can be a wonderful contrast to another part of a song where fuller chords are used and strummed freely. Check these song lessons for examples of that. https://www.justinguitar.com/songs/adele-rolling-in-the-deep-chords-tabs-guitar-lesson-sb-209 and https://www.justinguitar.com/songs/taylor-swift-shake-it-off-chords-tabs-guitar-lesson-sg-053
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