What people are saying: statistical production of "replacement" level wings is much lower than "replacement" level bigs. So you can get extra value that way.
You seem to be arguing that because replacement level wings "exist" (and start for thin teams who needed to sign them) the above statement is clearly wrong.
This probably needs to be ironed out more before we make this official - probably in a different thread. As it stands now, there aren't a lot of superstar big men, but who knows when the tide will change again in the NBA? In the 2018 draft, 5 of the top 7 picks were big men. Simply having an okay replacement level big man may not be enough in the future and bigs may end up being at a premium again. Even just in 2016, we had bigs like Mozgov, Biyombo, Noah, Mahinmi, and R Anderson getting humongous contracts.
Also, this all started when I claimed Bam could one day be as *valuable* as guys like Brown and Tatum. That's because I see his potential as an athletic, versatile, All-Star/All-Defensive big man. I realize Pho wasn't comparing Len or Baynes (who is having an otherworldly season btw. If he keeps it going, he will be paid MUCH more next offseason) to Bam directly - I just apparently see him in a different tier than others.