Summer isn't a temperature so that doesn't add any value to your question. It helps to offer your region's summer temperatures.
I agree 72 is quite warm for a CPU during gaming but it's not dangerous.What I don't like is the fact that I see a static menu picture which means you lessened the load on GPU and CPU when you paused the game which would also reduce the respective temps. so the current, min and max temps. shown by HwMonitor aren't telling the whole story. While the 7700K is known for running abnormally warm only seeing a single temperature isn't really helpful. I'd rather see its minimum. current and max temps. Only pausing the game and opening that program doesn't offer much. You can start HwMonitor before you start gaming and then you can exit the game. It will remember the temps. outside of the game as you can see below
MSI Afterburner can also show your current info
and more of the bigger picture.
Going solely by temps. I assumed you were using a stock cooler. Now that I've read some details I see you are using an aftermarket cooler. I'd expect it to cool better than it is. Time to look at your cooler a little closer. Ah, an AIO liquid cooler.So that's a 240mm double fan cooler and 72 is the best it can do in FC5? Here in the US I would have gone with the Kraken x62 instead.