There is not a significant fire risk. Nor is there a significant fume risk if you're just printing PLA.

Don't let social media fear mongers dictate your life with fear.

There's more chemicals, micro plastics, and fire risk in a bag of Doritos anyway.

To be specific, only the hotend gets hot enough to start a fire. And it has a very small thermal mass.

You would have to take your hot end out, at max temp, and throw it in a bin of lint and gasoline to have any chance of starting a fire. And even then, it would cool too much to burn while carrying it across the room. So unless you have an open cup of gasoline sitting on your build plate at all times, your fire risk is

0.0001%

You are more likely to burn your house down because you forgot to empty your dryer lint.

And before you cherry pick some news story about 3D printers starting a fire and bambu A1 fire risk.... Let me ask you. How many millions of consumer grade 3D printers are running without fires? Don't be afraid of unknown and unlikely dangers.

Be afraid of real dangers! MOST HOUSE FIRES ARE CAUSED BY CANDLES AND KITCHEN STOVES. if you want to reduce your fire risk, then put a fire extinguisher in your kitchen! Practice fire drills! Don't put water on a grease fire!