I just want to live a stress-free simple life. I manage my finances fairly well with investments. However at the same time i feel bad for choosing this because of what my peers are doing?

Just set your own goals. When your orientation is inward, you have no time to compare yourself with others. For instance, I call myself cryotosensei and am posting heavily on r/cryptocurrency because doing so will give me moons, which are worth 45 cents each. Just walk your own path lar. Life is short

It's your life... what brings you joy?! your peers may want more things that you do, so they need/ have to work for it.

Always remember this quote" comparison is the thief of joy" so don't compare your situation with others. While others might want your lifestyle.

Stop comparing and you will feel at peace. But if the stress comes from doubt that you might not have enough for the future, then maybe it's good to take a good look at your financial situation and makes gradual change. Being overly concerned about wealth is not good, but at the same time, being overly complacent is also not a good thing. Need balance so you can find contentment.