HF tools are not designed for the long term, generally. If you need a tool to work at least once, for one job that you are never going to do again, HF is “good enough”.
The rule of thumb is to never buy a tool there that could result in a gruesome death if it fails to protect your life, like jack stands. (Invest in quality safety equipment first if you get something like an angle grinder.)
There is a caveat, but yes: By definition, 3D printed parts should not be considered food safe.
Single-use cookie cutters are generally OK if you don’t use them multiple times a day every day.
There are probably minor chemical risks but it wouldn’t be in high enough quantities to kill you. There isn’t really anything inherently food unsafe with PLA, ABS or PETG.
Bacteria is a much bigger risk during reuse because you can’t fully clean the prints between the layer lines and other surface defects. The plastic generally won’t survive a proper sanitization process either.
What your own risk tolerance is for plastic additives is up to you. If you do print a cookie cutter, toss it after you are done.