Honestly, championship Windows closing quickly is more common that you think
1. Showtime Lakers closed immediately when Magic got HIV
2. 90s Bulls ended immediately after the 98 season
3. Kobe and Shaq Lakers window and did with the Shaq trade
4. 2011 Mavs basically got rid of their entire title team within a season after winning
5. You have all of the LeBron teams in Miami, Cleveland and now LA
You have to know what you're getting yourself into. Teams go all in for a short title window and most the teams that do this never won a title at all. Look at the Nets and Clippers, for all of their investment, they have nothing to show for it.