Kinetic Weapons Are Just Better: For most things, yes. It’s not that they don’t have perfectly functional energy weapons, or power cells which can manage the job – if you can run a mass driver that can get a flechette or slug up to a respectable fraction of the speed of light, yep, you can power a laser with it too, just fine. Nor do energy weapons lack their place – lasers are a damn fine way of pumping heat into things, which is very handy in starship combat, for example, and electrolasers (fire the laser to ionize a path through the air to your target, then dump a lot of voltage down it) make excellent stunners and anti-machine weapons, and EMP weapons are also handy for the latter, if really hard on the infrastructure. Blinding lasers are effective on at least many species and relatively humane.
But in practice, it’s a lot easier to solve the problems of making really awesome kinetic weapons than of dealing with beam dispersion (while you can do some cool blasting-shit-apart – not slicing it up – with a big laser or graser, you would generally prefer not to have to let it get that close), atmospheric humidity (a big problem for electrolasers), and other such things, and in some cases vulnerability that varies sharply by the precise way the energy is delivered, and suchlike. So while energy weapons of various types are part of the arsenal, in the special uses for which they excel, the jack-of-all-trades weapons still Throw Stuff At You Really Damn Fast.