Exactly the reason why Qatar World Cup happened in winter season because the humidity and temperature is not that much of a problem compared if they will commence the games in summer just like what we used to because the heat will become a major problem to the audience especially the players who are playing under the heat of the sun. But even if it's already winter season when the games happened in the recent World Cup, the stadiums still needed a lot of help to cool it down.
The schedule of FIFA World Cup in 2022 overlapped with some of the major European leagues and many of the clubs were even threatening that they will not release any of the players for the tournament. In the end however, FIFA was able to settle a deal between them and the clubs. However, for me this sends the wrong signal. World Cup is the most important tournament for the sport of football, and greedy clubs want it to be given a low priority. Going forward, I am sure that these sort of clashes will become more frequent.
To be honest they would never do that, there are many players with contracts that states if they go further in world cup and they play at least in 50% of those games, they would get a bonus. This indicates that teams want their players to play in the world cup and play a lot and go further so that their value would go up and you could sell them later on. That is of course useless in most cases and doesn't really happen that often, but at the same time we are talking about a situation that proves that clubs wants their players to go to world cup as well.
Obviously it was a terrible thing that it was right in the middle of the season and I rather watch it during the summer as well, but Qatar is so hot that even for a November-December cup, they had HUGE AC's built into the stadiums to cool it down.