Dispensing advice like this to someone with anxiety issues is exactly the same as telling someone with depression that they should get out of bed, meet people, be happy for what they have, or smile more.
It is the kind of swapping of cause and effect that many neurotypical people fall into when conversing with those who are suffering. All of the behaviors and habits you describe are largely the result of healthy mental states, not the cause (there can be feedback loops that make the distinction fuzzy, but those feedback loops are very fragile and require constant maintenance).
I'm sure its well intentioned, but it's just not going to be very useful advice.
It is the kind of swapping of cause and effect that many neurotypical people fall into when conversing with those who are suffering. All of the behaviors and habits you describe are largely the result of healthy mental states, not the cause (there can be feedback loops that make the distinction fuzzy, but those feedback loops are very fragile and require constant maintenance).
I'm sure its well intentioned, but it's just not going to be very useful advice.