I do not know anyone personally that has been affected by not being certified in wound care....
Yeah, it all depends how much CME $$ you have. ABPM did do a nice thing in that you don't pay anything extra to renew the CAQs for wound, sports, etc. I did the wound cert since I had a lot of CME for prior hospital job (and not many places to spend it during first year of COVID) and was doing a fair amount of wounds and amps at the time, but I probably wouldn't have done it in PP setup with more limited CME and less wound care practice... or if it had carried annual upkeep fee. It certainly won't hurt me if I go back to a hospital employ or want to get privileged somewhere new.
...There is so much to treating the diabetic foot and wound care. The actual product I use is usually my least important decision. I am not saying the exams do not cover more than just wound care products as they certainly do. It is surprising how little EBM there is to support using one wound care product over another.
The ABPM CAQ actually had very little products on it (probably because they have almost zero quality EBM?). I spent time to memorize most of the dozens of wound wizard products from the FDA and CMS lists, and you see they have basically nothing but tiny maker-sponsored trials or sometimes basic non-inferiority or comparison trials. On the exam, there were maybe a few questions on what dressings for wet or dry or etc wounds but almost none of the skin graft subs. It was not a bad test overall... I just had to put the answers they would want and not amp anything reasonable (which is my actual practice: amp any obvious osteo, neuropathic deep plantar ulcer, deformity failing Rx shoes, etc... get them healed fast and into a toe filler and on with life, or to BKA and on with life if they have no reasonable foot salvage).
I would agree with CutsWith... there is not much to wound care and limb salvage. It is the easiest part of podiatry...
If they have PAD concern, they go to Vasc asap.
If it's venous, wrap and compress with occasional debride.
If it's biomech/pressure (majority of DM), offload with Rx shoes/insoles or brace it... or amp/recon (and recognize equinus!)
If it's traumatic, control infection and debride aggressive.
A few pts are just way too sick medically with PAD and bad immune system and bad overall cardiopulm, so you polish spit and try to keep it from getting infected before they crump. There is a reason those wounds are often done by students and the amps or I&Ds are first year resident cases, though. The part I hate about wound care is how pts can often be duped into any plan by the docs (and a lot of DPMs want to keep the cash register churning). It is frustrating having to tactfully explain to people why they need an amp even despite some prior treating DPM (sometime my colleagues) crazy graft or Chopart with tendon transfer or months of TCC or honey or silver dsg or years of wound center debridement or Charcot frame attempt just a year prior...
"The pathway to amputation of the leg is littered with bandages and dressings which have deceived both doctor and patient into thinking that by dressing an ulcer they were curing it." 
