I always assumed the safety glasses warning was to protect against shards of whatever you are cutting. Shot off like a missile, and this was cutting pros pro kingut which is probably marginally stronger than wool.

In fairness...... they are old!

My favorite snips I believe are flush cutters made by beadalon. Get them in jewelry making area at craft stores. Hate to say but the ones I like the least are my new babolat snips. Instead of cutting the string they more or less just pinch it in half.
Ive been using the tool kit that came with our new prince 7k stringing machine,,
while I do like them, im seeing signs of wear and looking to replace anytime, this after 2yrs time,,
at home I use cheaper more disposable options that are a fraction of the cost, and can be replaced after 1yr if needed..