If you want to buy a boat, the answer is of course no. And a boat will be fun.
If you need to prove you need one to a spouse, tell her it will be dangerous for you to fish without one.
To me it is like the question, "do I need another rod?"
Would you live without a boat? Define living.
You want the boat, so go get it. If you will feel less guilty, get one twice as good but used
No difference in cost, but better value.