I believe those who filter out anyone below 6' (other than 6' women who look for partners same height or taller) are not only "tall man hunters", but are also gold diggers who will make their future 6'+ partner feel very uncomfortable, just so they feel good about themselves. Life doesn't work like that. Fortunately most people are not like that.
This is another one of the reasons I would rather lengthen to 5'11 instead of 6'. I feel that being 5'11 is tall enough for me to live a perfectly satisfying and care-free life where I can be happy every single day, without any height problems, and the only people I drive away are those who are 6'+ preachers.