I have a question about carriage bolts, and when they are appropriate to use, instead of more traditional hex head bolts. If I understand correctly, their main advantage is that they can be tightened from only one direction, the square part under the bolt head providing the resistance. With a hex bolt on the other hand, you have to use a wrench to hold the head in place while tightening (or untightening). Is this the main advantage (aesthetics aside)?
Are the carriage bolts square part able to provide that resistance in soft wood such as pine or cedar? Or should they be used mostly in hard wood? Could the square part tear through soft wood and start to spin while being tightened?
For reference, the picture below shows what I mean when I say carriage bolts vs hex head bolts. I've seen some terminology confusion on the internet.