Disagree.
Most people aren't shopping at Amazon because they can avoid sales tax. They are shopping online because they can minimize time and energy.
I had said this early and I'll repeat it. Most people are busy and many are getting beat up every day. Kids, bills, 8-12 hour days working, stress, grocery shopping, tasks, family time, training, additional education, more bills, only 2 weeks off a year, etc. Most people are just f*ckin tired. Very tired. Also, with humans our biology tells us to minimize time and our energy output. Shopping online fulfills this.
1) Ordering on Amazon; I take out my smartphone, tap the Amazon app, tap the things I want to purchase, CC is charged, wait 2 days, it's over.
Time: 2-3 minutes.
2) Going to the B&M; Take time out of busy schedule, get in my car, fill the tank, drive 10-15 minutes. Maybe even longer. Go into the store. Search for the item. Interrupt the busy sales guy if I can't find it, Pick it up, wait in line, get into car, wait in traffic, etc..
Time: Anywhere from 20 minutes to 1 hour.