That may well be true but in your question the term "hacking" is possibly just a little bit too broad. To look at it another way it's kinda like someone saying "I barely know anything about electronics, should I buy an oscilloscope?". If they have decided that the aspect of electronics they are really interested in will need them to have one, get one. If they don't know yet, no.
Similarly with "hacking" or pen-testing. If you have already decided that the aspect of pen-testing you are already interested in is what the bash bunny is good for, get one.
Hak5 itself doesn't seem to be putting out any content now, so have a view of the older Hak5 vids where they actually talk about pen-testing topics. Maybe have a rummage though Null Byte's vids as well. See if there is a particular aspect that particularly interests you. Then watch vids and read up on it a bit, download a few tools, destroy a VM or three, maybe tinker with a bit of wifi sniffing and get the feel of it. Experiment and be realistic. You are unlikely to be able to instantly (or ever) get to grips with methods of privilege escalation or exploiting current vulnerabilities and, like me, you may never want or need to.
Use your own dedicated kit (such as Raspberry Pis and / or VMs) when experimenting. This means you can control all aspects of the scenario you have set up. Also you won't get into trouble and this is important as even if you didn't intend to you could fall foul of the law just by not knowing what you are doing. Things like an unitintentionally "uncontrolled" payload can cause havoc. Additionally you won't get frustrated when current security tools on your day to day kit throws up warnings about a bash bunny payload, the presence of a LAN Turtle or light up like a christmas tree when you switch on the "man in the middle" mode on a pineapple, because you can disable any security or not even install it withot it affecting your primary system(s). All those "frustrations" have happened to me.
I am not trying to put you off or put you down, far from it. I did exactly what you are thinking of doing. I bought some Hak5 kit, plugged it in, got it working and thought "now what?" Sure I had some success but what did all this actually mean? I did not know enough to understand or make use of it. So I put it away, decided to concentrate on basic wifi as a start, got one of my Rasberry Pis, an old Alfa USB wifi device, a spare access point to be my victim, and proceeded to try to install and use Aircrack. As I went along I became more familiar with the terminology and the techniques behind what the Pineapple does and moved on from there onto other aspects.
Finally, if you are anything like me and just like gadgets, you'll probably get one anyway regardless of what anyone says 🙂