I agree with this to a degree. I definitely could have made any of my previous amps "work" The problem comes with excess noise, grating frequencies impossible to dial out and base voicing/thump.
Excessive noise
This may seem simple: gate it. But if the loop is trash gating only takes you so far. If it has a great loop, you may have so much inherent noise that the gate is turned up high enough to cut off your sustain.
Grating frequencies
These can sometimes be dialed out if you try hard, but then you have to sacrifice mids, presence and gain
Vocing/Thump
Really i could put a slash between all these things, because there will always be a sacrifice. The best voiced amps I have played are ground zero Moab+, mesa Dual Rec, Mgl red (my current amp), and diezel VH2.
But sometimes when you have that voicing, the chugg isn't quite there. Sometimes you cant get the thing to cut the way you want it to.
It really all is splitting hairs and more important to a bedroom player than gigging musician, but that is what most of us are here. It may seem silly to be that particular when you arent that good of a player, and I accept that. But just like sex, it is all about pleasing the only motherfucker that matters