Yup, if you don't know what to expect leg kicks fucking suck. I used to train Muay Thai and there were some dudes who I'd hate even holding pads for because their kicks would pretty much go through the padding.
Here's Jon Jones lightly kicking Jim Norton on Opie and Anthony: https://youtu.be/fMQCRbsK7Zk?si=1pqufzK5vSyJqIIE