no, it is will not hurt your printer, you might get annoyed after awhile having to do this.
Keep in mind with laser printers, while the print looks nice and crisp, once you start scoring and folding the parts, the toner will flake off, as the toner sits on top of the paper, and unlike an inkjet where the ink soaks into the paper.
2 remedies exist to prevent flaking, spray the sheets with a fixative, this will make the toner more plastic, and flexible, and will reduce the flaking, second is to select the card stock or heavy paper option as this will make the fuser run a bit hotter, and allow the toner to attach to the paper a bit better.
but keep in mind, YMMV
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