Well said Coach. We all play by the rules that are put in front of us. They have changed several times in the last decade and every time they were, we all played within the rules and did the best we could with what we had; again within the rules.
IF a school has a chance to win a team trophy at state (used to be only 2 for a long time) then the coach should do what he can to help the team even if it means switching the relays within the rules. This is not a "win at all cost" attitude when a coach has an obligatin to help his team in a team situation. In track, you can still win state without winning an event. It can be done in cross country, swimming, wrestling/individual based sports but hard to do in ball games. I think most unselfish kids/parents are ok with coaches that make those changes if it means they can still have a chance to win it as a team.
However, if they aren't in a position to win a team trophy, the coach would probably already have the kids in the events that would give them a chance to succeed at the highest level as an individual or relay and not feel the need to substitute. That alternate(s) probably wouldn't get to run in district or state in that case and would have to make his own way or hope for another chance on another relay.
Either some of the respondents aren't coaches or haven't been for very long and have yet to figure out how to recruit high numbers and hope for some increased quality/depth and win within the rules. Rather, they spend too much time complaining about things they don't understand. Good coaches don't always win but they figure out how to maximize their potential and eventually will have consistently competitive programs because they figure out what it takes to compete well within the rules.
As far as coaching at the state meet; there is still too many constraints on the coach as to how little control they have for their state lineup since they are declaring their entries the week before state in a one day meet qualifyiing for a 3 day meet. Imagine a football team being told they can only run certain select plays that they decided on a week before the state championship game or suffer disqualification. In addition, Track doesn't get a little yellow flag thrown for a 10 yard penalty when a rule is violated. The athlete is thrown out of the event with no chance to come back and still win/succeed/achieve. There is no wrestleback, no last second free-throw, no overtime shoot-out etc... It's done right or not done at all. Again, the rules of the game dictate discipline, paying attention to details and getting it done right the first time. Most of that occurs in the planning which sometimes requires using an alternate to qualify.
What if they decided to let us bring 20 kids to state and use them wherever we liked? No more than 4 events per athlete and no more than 6 athletes in an event. Take advantage of your strengths and exploit the weakness of the other teams. I think I would have more control over my lineup than under the current system that has to declare their gameplan a week prior to the state meet regardless of illness, injury, different meet format, different competition etc...