It isn't about not having home games. The crowds at schools ranked 17 - 32 would be as good as - maybe better than - those at schools 1 - 16. But what it does is makes it possible for a school ranked 17 or 20 or 25 a chance to win more than once in 10 years. Obviously the rankings by the committee are not anywhere close to perfect, but the bracket assignments have the effect of declaring winners in almost every case.
The point was made earlier that crowds are dwindling. You can ignore it, or you can use your wisdom to look for possible solutions. Admitting, of course, that nothing can be guaranteed. Well except for winners when brackets are assigned like they are now.
When weaker teams get to play at home occasionally, some of them will win on occasion. That is what sport is all about. Real competition.
Cannot dispute some of the weaker teams getting home games in the first two rounds will generate a few, perhaps very few, more upsets. But given the NCAA because of pressure from TV moguls are going to place some emphasis on attendance you have to look at the NCAA's priorities. Would they rather set up a tournament to give the weaker teams more of an advantage and generate a few more upsets. If so give them the home court advantage.
Or do they want to design the tournament to maximize the opportunity for the the best team to win the tournament. If so you give the home court advantage to the top 16 seeds. If you want total equity have a neutral site for all games (virtually impossible).
Also I will take issue that the crowds at the home court of teams ranked 17-32 would be as large as those of teams ranked 1-16. Using the NCAA attendance figures for 2016 (latest available). The top 16 teams in attendance included 8 teams seeded in the top 16 and 13 of the 16 were ranked in the top 50 attendance schools.
Teams ranked 17-32 had 1 team ranked in the top 16 attendance schools and only 7 teams ranked in the top 50. Estimating (swag) the average attendance for all schools not ranked in the top to be 2,000 for each school allows for an extrapolated comparison with the comparison advantage to schools 17-32 because they have more schools (9 vs 3) not ranked in the top 50 of attendance.
Using the extrapolated number reference above the average attendance for the top 16 ranked schools was 5,056 and for schools 17-32 was 2,924. Hence projected NCAA tournament attendance at the top 16 schools could be projected to be about 73% better than the schools ranked 17-32 for the first two rounds.
Personally if I am going to provide an advantage to any segment of the tournament I am going to error on the side of giving the advantage to those teams that have earned that right on the court via wins, losses and level of competition not a lower quality team.
Upsets are fun to watch as it is the American way to root for the underdog. But to me the objective of the NCAA tournament is to crown the very best team the champion. If that happens to be UConn 6 out of the last 10 years so be it. If one does not like those results then their team needs to get better. We all started on a level playing field and some have worked harder, smarter and longer to earn the right to be champions.