Yes, they do happen.
My stance is that the playoffs should be as competitive as possible. If that could happen with making some changes as to how playoff qualifiers are classified, then I feel that is something worth exploring. That does not mean that blowouts won't still happen.
I feel that there are too many blowouts in the playoffs. I realize they cant be eliminated, but that does not mean we shouldn't try to reduce them if we think there are too many. The question I keep asking each year, and that nobody ever answers, is how many blowouts are too many? If what we experience now is not enough for people to say "enough already," what would be? What's our collective pain tolerance for this?
If you're good with things as they are now, fine. What wouldn't you be good with? Perhaps you don't have an "enough already" pain tolerance?
Lastly, there's discussion about allowing all teams into the playoffs. If there are currently 70-0 playoff games with 9-0 vs 4-5 teams, what would it be like Iike with playoff games between 9-0 and 0-9 teams?
Opinions will vary and that is okay, but I will answer the question you pose in your third paragraph with my own personal view on the matter. There is no number of blowouts that is too many for me. I am willing to let the first two rounds of the playoffs weed out 75% of the teams, many of which are less competitive, and then I consider the playoffs to begin in earnest with the quarterfinals. There are some interesting games in the first two rounds, but beginning with the quarterfinals most of the games are interesting. I try to remember the playoffs do not primarily exist for my benefit as a fan, but, instead, they primarily exist for the enjoyment of the players and for their positive development as human beings.
I am not in favor of allowing all teams into the playoffs each year. Limiting participation to 32 teams per class level gives each team a goal to pursue throughout the season. Admittedly, the goal is more easily achieved by some teams than others, but it is still a goal for many teams that gives them something to look forward to. Within the 32-team per class level constraint, there are (in my mind) three objectives that should be pursued by the IHSA. They are, in order of importance, the following:
1) Create a process for determining eligibility and for seeding that is transparent and relatively simple to understand and administer.
2) Provide a reasonable opportunity for all IHSA members to participate in the playoffs.
3) Promote some semblance of competitive balance within each class.
You will note I am not totally opposed to some small movement in the direction of competitive balance, but it is the least important of the three objectives to me and the process would need to be objective and, in some sense, fair.
Hopefully, two things have been accomplished by this post. First, you can no longer claim that nobody ever answers your question of
"how many blowouts are too many?" Second, although I will never claim my views should take precedence over your views in this matter, the push back you have received by a number of other posters might suggest you will have a hard time persuading others to your point of view. [Or at least a sufficient number of people to give you hope that significant changes may take place.]