I think that's egotistical gatekeeping. There's no basis for 64GB being "pro" and 32GB not (or even 16GB or 8GB, for that matter). You can make millions of dollars on an MacBook Air with 8GB of RAM. Your use case does not dictate what is a reasonable amount for other professionals.
What do you do with 64 GB on your personal machine to use it up completely? Just curious..