It depends where you are/live, because such kind of behaviour is quite norm in Asia - particularly Singapore, Hong Kong, Taiwan, Japan, Korea where infrastructure and policies are quite different comparing to US/EU.

I reside in SIN, I travel with carry-on only on my business trips. I leave home about one hour before of scheduled departure time. 95% of my flights leave at 6-6:30AM, taxi takes 20min to reach the airport and there is no traffic. Getting boarding pass on a counter (SIN does not have kiosks) takes 3-5min max (due to *A Gold status), passport control takes 1 (one) minute due to automated gates, so within 30 min I left home I am on airside and usually have 10-15-20 min to get to lounge, grab a coffee/snack and then head to the gate.

I would not do the same in States due to unforeseen factors. Last month I was waiting 20min at precheck line at SFO. Add to this potential traffic problem and if you need to drop off rental car, add to this required time as well. I stay 45 min from SFO in South Bay but I usually leave 2.5h before the flight just to be on the safe side.