It Doesn’t matter if you have an FUE or FUT, your native hair will keep falling if you aren’t in any meds so this safe zone argument is moot. And not all safe zones are created equal, it will thin out as time goes on as well. But hey, you can get an FUT and don’t have take meds if you don’t want to but you will have nothing but transplanted hairs on your scalp with all your native hairs gone or thinned out, your choice .