Look, look, look. Hold up for a second. Hold on. Wait a moment.
Our ancestors survived for, like, thousands and thousands of years without advanced climate control, 24/7 news feeds, and 10 million modern conveniences.
You won't die if you're a little uncomfortable.
Not only that, but there's this really cool thing your body can do called "homeostasis" — see, your body doesn't want you to die from heat stroke or freeze to death, so if you're out in hot or cold weather regularly, you actually get tougher and more able to withstand it.
Likewise — get this — walking to places makes your legs stronger, running makes your lungs stronger, lifting makes your muscles stronger.
This isn't rocket science, of course; we've known this stuff for basically forever.
But the counterpoint is that your body is lazy, and doesn't want to expend all sorts of resources on stuff it doesn't need.
In fact, that sneaky body of yours will sound ringing alarms if you try to do stuff out of the norm. If you're out in the hot or cold, it starts shouting at you.
You should somewhat listen to that shouting. Don't be stupid and hardcore and die, of course. But neither should you be afraid of any single discomfort. The more you flee from discomfort, the more you reinforce to yourself that you can't handle it, and you never develop the physical resiliency and mental coping mechanisms that would make the discomfort trivial.
So — go out in the cold sometimes, or the hot. (Please don't be stupid and die.) Walk more, run more, lift more. Do things that scare you. Skip climate control and the internet for a while.
Constant comfort means no adaptation.
And that means weakness.
Nietzsche had it right —
"Was mich nicht umbringt, macht mich stärker."
Go get uncomfortable.