If you enjoy knives and would like to buy them and try them out, do it.
As long as everything that comes first is taken care of and you can, get yourself more knives.
Do I NEED more than 1 or 2 knives? No.
Do I NEED a knife worth more than $100? No.
Do I have them? Yes.
Why do I have them? Because I like them and enjoy them.
As long as you like them and enjoy them that's the only reason you'll ever need.
The way I look at it is this...
Yes, I can spend the money on something else, like a movie, go out to dinner, buy other little things I don't need, something fleeting. OR I can spend the money on a knife I like and enjoy it for a long time, knowing it's gonna be there for me to love and enjoy and it will last, versus something else that gives me a good feeling, but is fleeting and is only a good feeling for an hour.
I say buy them. No one around me understands why I spend so much time and money on my knives. It's simple. I like them, a lot. I thoroughly enjoy them. They make me happy. So where's the problem? I could have ate junk food for a week instead, but that's not worth it to me.
If it's worth it to you and you know you'll like and enjoy the knives, I don't see an issue with buying some.