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> You can't watch TV with only a sound bar, but you can do the opposite

You can watch the soundbar with only a TV?

The soundbar exists only as an audible wavelength up until a TV casts it forth into the spectrum of visible light.

Some TVs have good built-in speakers. Most don't, but if you look for them you can find them.

TVs don't compete with sound bars, but sound bars certainly compete with TVs.

Not the GP, but I think the comment is akin to 'inertia is the competitor of everything.'