Legs are a tricky thing to build for some people.
I used to have skinny legs at one time as well despite being an athlete (not a pro obviously) and doing weights on and off for years..
Then I went into Shotokan Karate for 3 years...my physique completely changed. We had to hold stances and the Sensei would go around the class and critique the stance. Sometimes it meant holding a stance for 10 minutes or more. I was in Karate for about 8 hours a week which consisted of perfecting stances (as part of our Katas), and Kumite (fighting) at the end of every class. 8 hours a week is nothing extreme.
It took about 6-8 months (which is about how long my legs were sore for) but in terms of my legs all of the little supporting muscles became much stronger and as a result the bigger muscles became stronger and bigger as well...especially around my knees. It really surprised me....obviously in a good way. It educated me on the value of using other methods aside from weights to build strength.
When I look at Nuges legs I see the same thing especially immediately above his knees....not nearly enough muscle there and around the sides of his knees.
He is already a great skater but building his legs (that doesnt necessarily involve heavy weights) would give him more explosiveness and also allow him to be stronger on his feet because he would have more leverage.
I am truly surprised that he clearly hasnt explored enough in that regard.
Anyway...a rather long winded way of agreeing with you.