This really hits home with me. I've studied and researched hair systems for the better part of the last 2-3 years. No doubt they've come a long way from the days of the brutal looking toupee's. They can look absolutely 100% undetectable today if done right. Unfortunately that still doesn't change the fact that you are in fact wearing hair and yes there is maintenance required and yes it can be a hassle (i.e. Better make sure you got a hat or bandana on at the beach on that 90 degree day).
But for me I feel I would just have general anxiety or paranoia about having it on, people possibly noticing something being "off", and the overall idea that at the end of the day I am wearing fake hair. Having that "don't give a F" mentality works for a lot of people, but it can only go so far with certain things. I'd be much more comfortable if I at least had a real hairline up front and could maybe wear a system behind it, but a complete full topper always kinda wondering if my hairline looks sharp and clean anytime I leave the house or the next day after a clean up I just don't think I could do it.