To be clear, I agree with you, but manufacturers were trying to meet the demands people had at that time.
@MARK2C told me that the reason the "fizz resistor" was added to the VH4 in 2007 is because players were asking for a more "metal" VH4 that was brighter and more aggressive than the previous models. So Peter came up with that clever fix to make the amps brighter and gainier. At the time, people liked it. Now everyone hates it.
Same with Mark series amps. Mesa was trying to make a 3-Channel Mark because that's what players were asking for. Dual Rectos are no different. People wanted a 3 Channel Recto that was brighter and gainier, so Mesa made it.
I think people just wanted less raw, more production-friendly amps in the 2000s. So manufacturers responded. In retrospect, these weren't great choices. But it sold a lot of amps, haha.