I don't want to sound disrespectful in anyway but this really isn't true or what you mentioned isn't totally true. Ya there are some low level products, but there is some really good medical brands or geared towards medical. But IC vs ABDL -IC has different levels of need and each person voids differently normally diapers usually recommended for those with decreased mobility or things like bowel ic many choose to wear diapers for ease of use where abdl the diaper is part of the role play. But because everyone's voiding level is different not every person with legit IC need max absorbency like ABDL diapers nor prints. Though there are some diapers where you can potentially use the bathroom but for most part medical diapers are for those that can't make it to the bathroom or where pullups can't be used. I do think your assessment is off of IC. The only thing in this that's true is usually abdl diapers aren't made to be discreet because it's part of the role playing or kink to have thick diapers on and some mimic older diapers when cloth & disposables where first used both were thick vs thinner disposables used now. Also another huge difference is with those with ic and can happen with the ABDL is skin quality and its highly not recommend to wear diapers for extended periods of time because there is a potential for skin issues. Though some choose to handle ic differently like babies when adult use diapers they aren't made to work for those extended periods and where alot of these companies have been in business alot longer & still in business so must be doing something right. In medical even with insurance they usually prescribe 6-8 per day so people are changing every 2-4hrs but with those with medical conditions many hospitals, care facilities, or caregivers shoot for the checks between 2-4hrs. Like I mentioned some do choose to handle ic differently but the ABDL diaper market is totally different yes they did make improvements but I been ic for over 10yrs and managed ic well before abdl diapers where readily available and even now me personally I use some in white on rare occasions.
Think it all depends on the store, 2 local shops or within 15mi including one where I get my meds have brands like Seni, Abena, Molicare but will say alot usually have what's Medicaid approved because that's where most of there business is so like there is another that sells Tena and Attends they do have small supply of Attends Premier which aren't that bad but for the price their not worth it. But in my area alot of places use McKesson & Medline as a distributor and McKesson is the distribution center for alot of web based stores like one I routinely buy from all shipped from McKesson and when I tried Xplus from ebay they came out of the same distribution center. But many big brands act as distribution centers when Molicare first available in the US and some to this day are distributed by Medline directly which has their own products but where they routinely do business within healthcare facilities Companies like Medline or McKesson does all their disposable medical supplies and sometimes that includes other brands.