Countries have had decades to build programs in all four disciplines, they just choose not to and now some will not be able to reap the rewards. Such is life.

They are Olympic athletes, it doesn't get much more in shape than that. Don't patronize them. We have all seen them skate back to back week to week from one end of the world to the next, broken foot, dislocated shoulders with mono and flu. Give them the credit they are due, they can all handle a programs that is a few minutes long.
If there are more than one alternate for a country, the first alternate travels with he team and the second alternate stays home and leaves only if called up after the first alternate is used, that is not new and won't change anytime soon. So some alternates can't stay in the OV, boo hoo, at least they are there.
Only if the "fans" look at it that way.
Many "skip" for various reasons some for injury and some just don't want to be embarrassed because they know they can't replicate the Olympic win so they just retire.
The only way around it (not using ice and skaters) is to invent a new sport with a new venue (can use ice or snow) and hope it catches on.