To be fair, none of us really "need"
DVC. These are, to a large extent, luxury purchases at the end of the day. And, I do think some of the answer here does depend both on your budget for a luxury purchase like this and what you personally want. I would say, assuming you've got your desired budget down, the question becomes what do you really want and why. And, there is absolutely no harm in slowing down to figure out what that is.
I agree with others about SSR resale - the reason to buy SSR is that you have limited upfront money for your desired points and so, would rather pay more per point over the life of the contract. It's essentially a hidden way of financing your points. IMO, BLT and CCV are far better deals.
Also agree on the Poly resale vs. direct - I would not personally buy Poly resale points right now when direct can be had for not much more.
I also think that, if you just want some more points for more stays while you're making a decision, buying more resale, if the right deal comes along, is also not a terrible way to go. People advised against that for me, and I didn't listen because I ran the numbers and felt confident enough that, should I eventually decide I want points at a different resort, I can likely sell them and buy points at a different resort without having lost too much other than the cost of annual dues. I preferred going that way to get more points vs. renting and trying out more resorts. But, to go this way, you take some risk and it's best to spend some time familiarizing yourself with the ins and outs of the resale market to ensure you're not overpaying for the points.