I can certainly understand from the spectator's point of view why someone might not understand why a school would bring a partial team to Team Regionals. I would point out though that the first flaw in the system is that an "individually" based scoring system was being applied to a "team" concept at sectionals. Just because a team won sectionals, doesn't necessarily mean they are a solid dual meet team. There are numerous examples through the years of teams who won team titles in post season events but really only had a handful of good wrestlers in their lineup. I don't say this to be disrespectful, but it is simply a reality.
A good solution to this team dilemma would have been for the IHSAA to implement a "classed" Team Duals event like many other states have in place. In Indiana we are assuming that schools of all sizes and demographics can compete year in and year out at an extremely high caliber, and this just isn't realistic to expect. With respect to "team", our sport is no different than say... football. Do we expect our small (1A) schools to play against our state's large (5A) schools in the post season? Most people would immediately say, "well of course not... the big schools have more kids, better weight rooms, nicer facilites, etc, etc." But for those exact same reasons, it is almost impossible for a small/mid size school wrestling team to compete with their large school counterparts each year.
Head coaches (and some assistants) of teams also understand the myriad of issues that can quickly arise with a team as well such as illness, injury, academic issues, etc, etc. during a season. Again, due to school size and demographics, not all teams have the luxury of having a full JV squad to fill holes in the varsity lineup when adversity strikes a team. It is easy to make assumptions about why a team wasn't at full strength, but again, until you have been at the helm of a high school team, I don't think it is fair to pass judgement.