This was historically true for construction [1]. Yet their wages are on a smooth curve upwards [2]. The entire cohort of construction workers is currently seeing high real wages, and their data almost completely hide Covid.
I’d also argue that commodity and skilled painting are different. The 50-year old commodity painter who honed his craft can charge a premium because he can smooth my drywall and put on a finish someone with zero training cannot.
[1] https://laborcenter.berkeley.edu/the-public-cost-of-low-wage...