No, machines should be used for some exercises.

Free weights should be a staple in your workout because they work on your stability, as you have to work harder to control the weight.

When using free weights, you particularly have to focus on keeping a tight core. With some machines, the pulleys and mechanics of them make weights easier to move about.

They can also target the muscle in a different way to free weights, and can be a good way to lift heavier weights. They can be useful if you have an INJURY too, because you can also lighten the stress you come under.

As long as you don't rely solely on machine weights, there is no problem having them in your routine.

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