Open Question: You should never attempt to grapple when fighting against someone with a knife(unless you’re experienced)?

I just looked back at Bruce Tegnar’s Book Savate and saw this on the page about Knife Defense.

This line got my attention:

“NOTE:It is imperative that when you are being attacked with a knife,under no condition should you attempt to grab,block,or parry the knife with your hands and armes.Remember,a person who carries a knife is generally experienced in using it and will be able to cause you serious injury if your hands are within his range.”- Bruce Tegnar,Savate:French Foot Fighting 2nd Edition P.122

What do you think?I did research on the web,and apprently every website on Self Defense and Knife fighting as well as other books I read on the topic such as Don Pentecosts’s “Put ‘Em Down, Take ‘Em Out!: Knife Fighting Techniques From Folsom Prison” agree with Tegnar’s advice that grappling should be avoided and only used as last result against opponents armed with a knife unless you’re extremely well-experienced in H2H.

Would you say Bruce Tegnar’s statement is correct?